The enlargement of your musical taste might or might not result in changes in your personal life. It may be a featherbrained deduction of future events that have been decided by what or what you do not listen to, but people around me (and including myself) have experienced drastic transformations when we decided to 'broaden our horizons'. Zeus says 'that's why you have friends' and 'everyone needs to make more friends', regarding the recommendation process, but this might actually cause for decay in your other relationships. How childish and trivial it might still sound; there are still those out there who do judge you on what you listen to. There will be those who drop you solely based on what enters your ears and what you decide to close them for. And what about people who do not have a prime capability of interacting with others? How are you to enter a new scene if you alone do rely on recommendations from others? It is not possible and you do remain as you are, because it feels safe and comfortable and you needn't necessarily step into a refreshing zone.
It is most certainly not wrong to experience new music, but it is certainly not a crime when the song remains the same either — and this is what people need to realize more often. There is little attention for those who do not advance or develop new interests and those are often left astray or behind. Not only in music, but in society as a whole.
I come from a grouped field of interest that included mostly eighties glam metal and thrash metal that went as underground as one could possibly imagine. These two clash like no other for no particular reason and it is where I almost was forced to decide between environments as even the people did not get along somehow. You see that expanding my taste here did not result in anything in reference to my social life, it did just expand my taste. It is a personal attachment to certain genres and that is where it often ends, and that is not a bad thing at all.
Now, it might be more loose with visual kei, as the music often does not actually matter as is often expressed through their image instead. I think with visual kei people need not to necessarily expand their comprehension of different genres as it does bear an immense amount of classifications already. Judging a band by its cover is no longer an option as you cannot visualize what type of music they will play just by looking at the image of them. People try and attempt based on what is pleasing to their eyes more often than actually entering a playlist on say, Last.fm (or any other radio-station that plays Japanese music, if those are in existence). You do not necessarily need to augment on other genres if you feel comfortable in visual kei, as there are plenty bands enough of each. Pop, pop-punk, general rock, heavier rock, metalcore, items closer to an actual thrash metal formation, and the list goes on endlessly. But I think even in this discussion it comes down to the fact that people do analyze others on their view on music.