I'm obsessed with twisty puzzles and and to collect (and possibly make!) many puzzles.
The 1998 OddzOn version.
The 2000 version.
2000 Edition from Seven towns.
2002 Rubiks.com edition.
CUBE (SHAPE PRESERVING)
The skewb is a very solid and satisfying puzzle to play with.
The black 1981 Meffert version.