I'm going full-fledged fucking geek on this one, because I collect a lot of Nintendo accessories and objects that have sentimental value to me. Nostalgia is a hell of a drug.
First off, Amiibo. They are figurines of popular Nintendo franchise characters, and most are linked directly to the new Super Smash Bros game for Wii U. There's currently approximately 80 something Amiibo out, and more than half of them belong to SSB. They have chips in the bottom of the stand that you can scan to access in-game features like naming and training your character, but to me they are purely collectibles. They're not coming out of those boxes any time soon.
http://i.imgur.com/aGD066f.jpg
Some are japanese imports, others are super lucky finds that are really rare. I picked up Dark Pit and Palutena from Kid Icarus (far right) just today actually. I'm expecting a Mewtwo Amiibo in the mail in about 2 weeks as well, so that's pretty cool.
And now that we're on the topic of Pokémon, here's some of my card collection!
http://i.imgur.com/HeE8BZ9.jpg
Newer stuff that's come out in recent years.
http://i.imgur.com/DsuOxrZ.jpg
A little older stuff.
http://i.imgur.com/hyqVuRr.jpg
And some real OG shit, you might remember these.
The entire thing is full of cool cards, but I'm not going to show every fucking page. Fuck that.
I've also got some sealed products that are just chilling, not at all screaming at me to be opened.
http://i.imgur.com/Ta5ZY2G.jpg
http://i.imgur.com/zLc74sS.jpg?1
http://i.imgur.com/GTrkz2l.jpg?1
http://i.imgur.com/XGSvyRq.jpg
I'm actually selling the single packs, trying to make some money back on everything I'm spending on this shit.
And lastly, this.
http://i.imgur.com/0puBkSb.jpg?1
This single fucking card is selling for several hundred bucks, and even in shitty condition (I'm talking bruised and bent) it'll throw up a good 60$+.
So, what do you guys collect? Anything goes, share whatever you like.