^perhaps Jpop was just a phase for you? Like how Kpop was for me...I used to be very into Kpop & Korean stuff myself, but then I got over them because I became bored of their repetitiveness...and Korean music is just so heavily adapted from the west that they just sound like Korean versions of Western music.
There's still more originality with Japanese music, and that's 1 reason why I love Jpop & Jrock, they still retain some of their own original & unique music style. I've loved Jpop & Japanese pop culture since I was very young...you could say I virtually grew up with Japanese stuff, since some of my relatives are half-Japanese anyway, so I was heavily influenced by Japanese pop culture since very little. And it has always overwhelmed me...even when I went through that phase with Kpop & Korean dramas, I still spent a lot of time with Japanese pop culture...this sort of "obsession" I have with Japanese pop culture only escalated even more after I lost interest in Korean stuff some years ago.
Some ppl do prefer artists to just stick to 1 area of profession, as oppose to doing a whole heap of different things...but that's the difference between all-around idols & artist who solely do 1 thing, like music groups. I personally don't see what is so bad with being a all-round idol...I mean, sure, they may not be able to spend as much time improving their music skills as music artists do, in turn perhaps they improve more slowly. But it's hard being a all-round idol, since you do different things, you have to focus on so many different areas of profession, it's complicated. All-round idols like the JE guys have to work extra hard, with their minds focusing on so many different areas spontaneously, it's stressful. From this perspective, idols have a great deal of respect from me. But I think this helps them grow in many ways, and building up their versatility.
Unlike music artists such as DBSK, who only has to devote much of their time perfecting their music, they don't have to work as hard as all-round idols do, and work is less complicated for them.
I agree with you about the music of JE guys...it's very repetitive, and frankly, I quite dislike that. Most of the JE groups have the same music style, I've heard many songs from other JE groups, and they're just not that interesting...always the same kind of songs & music over & over again...sure I enjoy listening to them about once or twice, but I soon get bored of them. This is why I much prefer listening to
KAT-TUN; they're the only JE group I listen to on a regular basis, because they have a broader range of music compared to most of the other JE groups, they sing a more variety of different types of music. Not only do they sing jpop, they also sing jrock, ballads, even some RnB...KOKI himself also sings hard rock/heavy metal music & Ueda I heard also sings some folk music.
Each of the 6 members are also unique in their own ways with their own distinctiveness, I love the dynamic of KAT-TUN (not saying that the other JE groups are not unique in their own ways too), and their songs are always very catchy (for me anyway), I can listen to their songs over & over again and never get tired of them! You can say, they are the only JE group I'm 'truly' a fan of!
Anyway, I also listen to KAT-TUN's senpai TOKIO sometimes, their music range is also very similar to theirs, like KAT-TUN, TOKIO has more variety in their music. These 2 are the only few groups in JE (from what I've noticed so far) who have this kind of music range.
It's true though that the JE guys are more focused on music nowadays, seeing that many have been releasing a lot of cds over the years...although the Johnny Jimusho have always focused a lot on music...but I think nowadays, they've perhaps increased their attention on this area even more...my guess is probably because now there's a lot of competition in the Japanese music industry, certainly with the existence of DBSK known as 'Tohoshinki' over there. As oppose to let's say, back in the 90's when the 'Japanese wave' was at its peak & Japanese stuff dominated the whole of asia...at the time, JE guys dominated the whole of asia,
things were probably not that competitive for the Jimusho back then, than it is today. Although the popularity & dominance of the JE guys (mainly the very famous who have already debuted) is still feverishly high in Japan & some parts of asia too...but it's also true that there's now some very tough competition out there for the Jimusho. I think this has perhaps given Johnny Jimusho the urge to increase their attention in the music industry.
But of course, acting and hosting still remains among their main focuses too.
It's true that not all JE guys act, but again, not all of them sing either, or host a TV show, or have their own radio show. Let's not forget that the Jimusho not only has their mainstream all-around idols...but they also have some dance groups too, these groups never debut, nor do they sing, or act, or host, or do anything else like their fellow JE senpais who have debuted. Instead, these dance groups are how they are labeled to be; dance groups, they mainly just remain as backup dancers for other JE guys, and they do nothing else...and sometimes these dance groups are not permanent, often some of them are just temporary units.
KAT-TUN for instance, was initially suppose to be just a dance group for their senpai Domoto Koichi from Kinki Kids, but they attracted so much attention that Johnny Kitagawa-san finally allowed them to debut as a solid JE idol group. Thankfully! Since I'm such a avid fan of KT!

I'm so grateful to Kitagawa-san for letting KT debut as a official group!
There's also other guys in the Jimusho who have yet to debut, like the Johnny Jrs...they are still in training, so are not focused much on music just yet...although some of them have already began to act.
Johnny Jimusho is huge, they have heaps of artists, much more than some may suspect...all the JE groups we see debuting, releasing cds & dvds, holding concerts, acting, hosting etc, all the ones who are being pushed & exposed in the spotlight...they are only just a percentage of the whole population of JE guys...I'm not 100% sure how much...but I'm guessing they probably make up roughly about 40-50% of all the JE guys in the company...but that's just a rough estimate.
The Jimusho has heaps of other JE guys who work in the background, out of the spotlight, they will never get to debut, never release a cd of their own, never host, or even act, as long as they are in the company...even though some of them have been trained in these areas. All they mainly do is shadow work; working in the background to support & assist their senpais, those JE guys who have already debuted.
This is another aspect I dislike about JE...they treat some of their artists very unfairly, without giving them a chance to do their own thing, give them the chance to debut & have the real experience of being idols etc...even if some of them have already been trained to...instead, they're being restrained to just doing background work & assisting other JE groups.
I've observed some of these less fortunate JE guys, and I think some of them really have potentials...but the company is just not giving them the chance to grow & thrive...and that's what annoys me
So to some extent, I do like the JE & often support them...but at the same time, there's also some aspects about the company which I dislike & don't support.