I don't usually get around to having a whole magazine subscription, even though I like magazines. However, ideally, I would be getting:
Acoustic Guitar - incredible articles, good reviews of equipment and nice exercises.
Strings - pretty good, but more of a flip through, bathroom type one for me.
MacLeans - (Canada's answer to Time, but more interesting I think) I like a good current events kind of magazine and they always include an interview with a book author that looks interesting and have some off-beat trivia as well.
Prevention - interesting health facts and the odd good exercise routine.
Guilty pleasures - Hello! and People. Would never subscribe to either.