I actually buy all of my band shirts at the gigs/concerts of the band themselves (at least then we know it's official merchandise)
So far I have 5 Trivium shirts. Guess who my favourite band is
I have 2 Slipknot shirts, from the 2 times I have seen them.
I did have a Korn (Issues) shirt, but it's too small for me now.
I have 3 festival shirts (Download 08,09. and Reading 08)
One Army of Freshmen shirt.
And one Maiden shirt.
I can pretty much say I am fans of these bands and not just fans of a couple of their songs I have heard my friends listening to. I don't even know any of my friends who like Korn... Quite sad really. Awesome band. So yeah, where the shirt to show your love of the band, not to prove anything to anybody.