i have quite a few Grateful Dead and Phish concert shirts, many of which are tie dyed.
also quite a few sports team t-shirts and jerseys...especially from the various University of Michigan varsity sports teams. of late i have become very interested in women's sports, and so have a lot of shirts and other gear from these teams. Even have an official team issued MIchigan softball jersey.
my favorite women's pro basketball team, the Detroit Shock, is no longer a Detroit team, but i still have well over a half dozen different t-shirts that are Shock related including those commemorating their 2006 and 2008 WNBA championships. i also have both the "home game" and "away game" jerseys of my all time favorite basketball player who also played for the Shock, Deanna Nolan.