I think it is good to experiment and explore who you are, and fitting into a crowd is nice for teenagers. Doesn't matter
which crowd it is (fashion wise) necessarily, as long as you don't just follow your peers regardless of whether you like it or not (it needs to feel right, and it may take a few image changes).
I've never ever been into fashion, but clothes DO change how you feel. Wear something you don't like, and you feel self concious, unhappy - it brings on an emotion!
Wear something you feel good in, and you
feeeel good.
Wear something to make you stand out, hide away, blend in - it's all psychological (well, a lot is.... especially when you're young).
There are very very few people in this world who are genuinely unique in their looks and dress sense, and even less who don't truely care (I'd say 99% of us just SAY we don't, or THINK we don't, when really.. we do a little bit
)