Well....don't say I didn't warn you.
Gaming I collect:I mostly just buy gaming things if they are fun, though I do enjoy finding cool variants of things. When it comes to games, I either get games I wanted, games I liked but didn't own, or games that people strongly recommend. I get games for:
-NES, SNES, N64, Gamecube, Genesis, Sega CD, Saturn, PS1
-GB, GBC, GBA, DS, 3DS, Game Gear
I do....kinda...collect Mario games. There's a few I have that absolutely suck, but they are Mario and nostalgic, so I keep them. I'd also like to finish collecting all the easily obtainable Virtual Boy games, as I currently have half of them.
I don't really collect the systems themselves, although I do own some variants like Sega CD model 2/32X
and Sega CDX, and most Nintendo handheld redesigns. Of course now that Wiggy is looking into back-lights for GBA and back/front lights for possibly more, I may have 2 of some of those systems.
I'll also occasionally collect interesting controllers - most recently the Super Game Boy Commander, Hori Digital Controller (Game Boy Player controller), and I've got my eye on the biggest monstrosity of them all: the Gamecube Keyboard controller.
Gaming-related things I collect:-Mario Kart & Diddy Kong Racing Toy Biz figures - Remember these? They go for A LOT on eBay, but every once in a while I get lucky and find a loose figure and vehicle that goes for cheap. I had Mario and Bowser as a kid, and recently I've picked up Yoshi, Wario and Diddy Kong.
-Pokémon Cards - I had a pretty big collection as a kid, and in the last 2 years I've decided to slowly complete the generation I expansions (base - gym challenge, plus variants, errors and promos). So far I've completed Base and Jungle, and I'm very close on Fossil, Team Rocket, Gym Heroes and the Black Star Promos.
-Nintendo Power - Now that the magazine is ending, I'm considering expanding my meager collection a bit....over the course of a few years.
I also collect various assorted Nintendo things from the SNES-N64 era, mostly things that appeared in Nintendo Power catalogues, like the bean bag characters (which I've completed to my satisfaction), soundtracks, strategy guides for my favorite games, and random other collectibles here and there.
Non-gaming things I collect:-Hasbro Star Wars Figures - This is probably my biggest collection. I basically want the best version of each character, so I don't have every Darth Vader variation from the muscular Power of the Force 2 line onward. I collect them loose, and for all 6 movies, the Expanded Universe and Other (concept art figures, Star Tours). I used to also collect The Clone Wars figures, but the variations of clones got crazy, the line has practically died, and they are now doing realistic versions of the characters, so I'm selling off the bulk of that collection soon. I'll periodically pull some out and display them near my desk so that they don't all just sit in storage in my room. The scary thing is I know many people online who collect all of the figures since 1978, carded. I can't even imagine the kind of space that would take up.
-Star Wars 30th Anniversary Coins - These were figure pack-ins at the time, and now I'm down to my final 2 promotional coins.
-Star Wars Omnibus - LOVE these. Some of my favorite Star Wars stories are the comics, and these collections are big, chronologically ordered or themed, and collect even the most obscure stuff for a very low price. If you ever want to get into Star Wars comics, start with an Omnibus.
-Star Trek Micromachines - I've got all but 5 now!
-Batman: The Animated Series Figures - Already had Batman, Robin and many of the villains, and now I'm pretty close to getting all the villains they released. Not interested in all those wacky neon orange Batman variants, other than this one I had as a kid that shot discs from his giant helmet.