for me, my all time fav is the "....and justice for all" tee by metallica.
i bought it from peninsula, share it to my then girlfren/now wife but she misplace it alreadi
my current fave us the ac/dc ball breaker tee. i seldom wear it tho'. just see and admire..keke...
I would like to have Iron Maiden's The Trooper Tee ...
ozzy osbourne's black rain tour 08 !
U2......custom designed, still wearing, only on special occassion
classic
My Bind Guardian's Nightfall in Middle Earth and Megadeth's Tour Of Duty shirts are my fave.