Boy's Life -- subscribed 1993 to 2002 or 3, but those last couple of years I was barely reading it. In fact the last year was in error and I was too lazy to cancel. Still not sure whether I paid or not.
Star Wars Galaxy Magazine -- used to buy but I never had a subscription.
I bought
Star Wars Insider at the newsstands from 1997 to about 2000, had a subscription for a couple years, then let it lapse sometime in 2003 since it had turned into a piece of crap. (It used to be a for-the-fans-by-the-fans type publication, now that it's run from in-house it's just a corporate puff piece with news that premiered online 2 or 3 months earlier.) I did pick up a couple of issues when there was some feature I really wanted. Then early this year I renewed my Hyperspace and I had to get the Insider as well. ****tards.

I read it since I'm paying for it, and I admit it does have some good content, but overall the percentage of good stuff wouldn't be worth it.
Disney Adventures -- about 1994 to about 1999ish, read but never had a subscription.
My dad used to have subscriptions to
Invention and Technology,
Popular Science, and
National Geographic so I read a lot of those.
Nowadays about the only one I read regularly is
Newsweek since my dad has a subscription.
Others I purchase sporadically are
Time and
Rolling Stone.