I'm obsessed with twisty puzzles and and to collect (and possibly make!) many puzzles.
2X2X2
The 1998 OddzOn version.
3X3X3
The 2000 version.
4X4X4
2000 Edition.
5X5X5
2002 Rubiks.com edition.
CUBE (SHAPE PRESERVING)
The skewb is a very solid and satisfying puzzle to play with.
FOUR
The black 1981 Meffert version.