I just did the band shirt section of my laundry, this is whats in rotation (see: hasn't been destroyed at work) as of late:
Agalloch - Logo
Blind Guardian - Tales From The Twilight World
Death - Leprosy
Deathspell Omega - Logo
Hammers of Misfortune - The Bastard (long sleeve)
Hammers of Misfortune - The Locust Years
Heathen Crusade II
Kreator - Pleasure To Kill (I like this shirt, but I hate wearing it anywhere. Someone else is always wearing this fucking shirt. Fuck them, I like this shirt more.)
Nokturnal Mortum - Mirovozzrenie
Primordial - To The Nameless Dead (Different design than the standard, 10 times more bad ass)
Sodom - Sodom
Slough Feg - Atavism
Slough Feg - Hardworlder
Thurisaz - Logo
Windir - Logo
Winds - Prominence and Demise
A bunch of these were shirts from those deals that are "Buy the CD and for 5 extra bucks get a shirt and a shitty poster". Fuck yeah, thrifty-ness!
Rotation usually lasts 2 weeks or so... I tend to trade some shirts in and out as to not destroy them too much. Gotta say though, ever since I got the Primordial - To The Nameless Dead shirt last year, I wear that fucker once a week atleast. I fucking LOVE the design on it, and I haven't seen it fucking anywhere. A fuck ton better than the standard one.