I used to buy a lot of graphic design and other related magazines back in college but these days I only tend to pick them up when I fly or am up in London where there's a killer selection.
When I do it's usually:
Wallpaper << my all time favorite mag
Computer Arts
Wired
T3
Robb Report
Esquire
Bizarre
Maxim
Mixmag
DJ
Almost none*, most magazines contain lots of irrelevant articles that I don't want to waste time reading. Why read irrelevant stuff when you can spend your time making more money?
*) I do read my wife's National Geographic while hanging out in the toilet zone...