Megami Tensei. Why someone is addicted to this series ? It has unique style and unique atmosphere. Not only the games, also everything out of this crazy world.
Sometimes I got pretty strange stuff...A book with artistic reference, a PlayStation game rare and unique and a Famicom game with an unusual character.
Boxes of old MSX, PC98, X68000 games are simply huge paired with other boxes. And sometimes full of contents too. And sometimes limited edtions contain peculiar stuff...