I'm 17 and I love plaid! No idea if it's "in style" or whatever - I don't really pay attention to that sort of thing. I just wear what I like that I look nice in. Also I'm from North America so I don't know if that makes a difference.
I actually plan to ask for a plaid shirt or two for Christmas this year! Only problem is I can't find one that's fitted nicely - it seems like all of them are relaxed and baggy, which looks really bad on me. Anybody know where to find a semi-fitted plaid shirt? That comes in petites? I was looking at L.L.Bean and Duluth Trading Co. - theirs seem nice.