Well, I'd say you aren't true gamer until you've played most of the consoles. I currently have an Atari 2600, NES, SNES, Sega Genesis, N64, Gamecube, Wii, NDS, Gameboy (big fat original gray), Sega Game Gear, PS1... and a PC full of emulated stuff. I consider old classics the foundation of gamers. I still play Atari and NES all the time.
Just buying an XBox 360 or a PS3 and having Madden 2010 and thinking you're a gamer?... well you can suck on my balls. Cuz I can't afford those systems. :-)