Some sprites I drew while learning to work on things like posing and more elaborate clothing, all while staying within the restrictions of using the NES color palette.
Microcomputer Graphics
Sprites made in the style of microcomputers, such as the MSX and ZX Spectrum.
8-bit
Graphics made specifically for NES and Game Boy/Game Boy Color.
16-bit
Going up another couple generations: Genesis, SNES, possibly even the GBA or PSX.
3D
Low-poly 3D work I've done, some of which were for an unfinished project; turns out making 3D games is really hard!