What do I collect? Hmmm...I suppose comic books is my first love for collecting. I have a fair amount of those. In terms of toys, I collect Transformers, Star Wars figures (Hasbro and Kenner), Lego sets, SH Figuarts, and some Role Play toys, such as lightsabers.
My favorite Collection is of DBZ/DBGT cards which went on from 1999/2005. I have one of the best collections of those in the world (top 3-5) I have the best DBZ Autograph Collection, including the only complete Goku and Broly Collections signed by their voice actors (Sean Schemmel-Goku, and Vic Mignogna-Broly) both collections are in their rarest forms, mint condition, and signed by the voice actors infront of me, as I later got to hangout with the voice actors, and got pictures with them. My Goku and Broly collections are the rarest in the world.
Besides that I have:
-Old Pokemon cards (Complete Sets from Base Set-Neo 4, All English and Japanese Promos from 1998-2000)
-All the oldest Sonic Comic Books along with the rarest, I have a huge Sonic Comic Collection this includes Knuckles the Echidna, I have all the issues of him too.
-All Batman Beyond Comics and every comic the character Batman Beyond Appears in, I also have lots of Nightwing Comics.
-DC Batman Figures, Marvel Spiderman Figures
-All Power Rangers things from Mighty Morphin all the way to Lost Galaxy, includes figures, weapons, morphers, zords, etc.
-Tons of really rare old school anime merchandise, lots of it is autographed too, I literally have hundreds of autographs as I go to cons regularly.
-I also have collected 1 of every video game system. Along with several other collections.
My Little Ponies from every generation (mainly first generation and the pricier internationals because they're gorgeous *A*)
Monster High dolls
Breyer Horses (don't "collect" anymore but I'm never getting rid of my older ones!)
Mew pokémon cards
Iwako eraser animals heart