I usually wear skinny jeans, since they don't get caught and I don't have to roll them up, and since they make my hiney look nice.
Otherwise, I roll up my jeans. Don't really give a f*ck what brand name they are.

In the summer, I often go shirtless, to avoid getting it all sweaty. In the winter, I wear more than one shirt.

Really, I just ride in whatever I'm wearing anyway, except that I have to wear sneakers instead of boots.