I would say you should grab all Nintendo consoles (they are quite collectable) and then go for Sega (Dreamcast, Genesis, etc.). Who knows? Maybe you could get into collecting Atari too (2600, 7200, Jaguar, etc.)
For right now, I wouldn't call it a collection. It seems like a normal amount of consoles for an everyday Joe. Then again... I have a NES, SNES, Virtual Boy, N64, GameCube, GBA, GBA SP, Wii, Wii U, Dreamcast, Atari 2600, Atari 7200... I guess I don't know what an average amount of consoles is anymore.
One last thing, your NES 001 is very common. Now an NES 101? THAT'S a collectors piece!