Apart from a couple of fairly standard cubes in the 1980s, I started in approximately Feb 2020 with a focus on solves, rather than speed - to that end I have very few duplicates but lots of very similar ones (eg crazy, Bermuda!) and tend to buy in batches of similar types
2X2X2
3X3X3
4X4X4
5X5X5
6X6X6 & UP
CUBE (SHAPE PRESERVING)
CUBE (SHAPE CHANGING)
CUBOID
OTHER SIX-SIDED
OCTAHEDRON
HEXAGONAL PRISM
OTHER EIGHT-SIDED
DODECAHEDRON
RHOMBIC DODECAHEDRON
OTHER TWELVE-SIDED
FOUR
FIVE
SEVEN
TEN
FOURTEEN
TWENTY
THIRTY
OTHER N-SIDED
SPHERE
CYLINDER
ROUND CONVEX SHAPES
STAR
HEADS & OBJECTS
OTHER SHAPES
SIAMESE & FUSED