I wear . . . whichever pair of pants feels comfortable that day. If it's cold, heavy jeans. If hot, denim shorts. If somewhere in between, usually a lighter pair of jeans or maybe cargo pants. Then I just pick a T-shirt off the top of my drawer - so long as it fits - and toss it on. And if I have to go out somewhere, like a restaurant or a birthday party, I'll wear a collared shirt. I don't like button-downs, though; usually save those for the rare occasions I go to church (Easter Sunday, Christmas etc).
Yeah, that's my fashion. For school, I have a uniform, though.
I don't tend to 'follow' anyone, though I had a short phase a couple years back where I wore short-sleeved T-shirts over long-sleeved ones. It wasn't so much 'hey, someone else is doing it, so I should too' as it was 'hey, someone else is doing it, and it looks like a good idea'.