I used to collect and read comics when I was younger. I mainly read Spawn, Scud (see my avatar), and pretty much anything by Johji Manabe (Drakuun, Outlanders, Caravan Kid, etc). Oh, and Gen13.
I enjoy comic books, but I'd bomb through a single book in minutes, so it just wasn't worth the money after a while. Nowadays I tend to buy entire Collection books. Sure, I don't get the neat cover art from each individual comic book, but it's a more worthwhile investment.
I
did collect Spiderman for a while, though usually just the ones with the Venom and Carnage story arcs in 'em. Actually, Todd McFarlane's artwork in some of those series is what made me follow him when he helped form Image Comics.