Favorite "Old School" game system

What is your favorite old school game system? For obvious reasons let's not list things like the SNES and Genesis/Mega Drive, ok?

My choice would be the good old Atari 2600. It was the first game system I got.

There were many great old school game systems out there...Apart from the Atari consoles we had NES,Master System,Gameboy and more.I would choose Gameboy because it was the only game system from them I had.Gameboy and GameGear were the systems I grew up with.
GB showed to us thay gameplay was all that matters.
On GB I played my first rpg (and Final Fantasy) game FF:Legend,my first adventure (Shadowgate) and my first Zelda game (Link's Awekening) and most of all my first Castlevania game (The Castlevania Adventure).
Of course GB had some of the best 2d platforms and rpg's that were ever released.
I still remember how strange I felt when I fought God on the end of FFL,the traps in the Swadowgate castle.Even know I an not really sure that happened in Zelda:LA...Did this world really exist?

my favorite would be the old school nes reason why is becuase when i was young maybe 13 or so i entered a tourney playing Super Mario 3 and other games and came in second so that was a great experience and thats why i love nes to this day still

ColecoVision! 8]

i dont think n64 is really that old but i miss n64 and the game Perfect Dark
and super smash bros
even thou im been using 64k often, online Perfect Dark wont work it dysncs to much
and golden eye does the same as perfect dark online
but i usally play
super smash bros
mario kart
mario party 2
those games work pretty good online

aa good old n64 i like playing the games on my computer way better graphics but i would have to say that i liked snes the best since that was my first gaming system and what drove me to learn how to program :D

My first videogame system was Atari, but I don't remember if it was 2600. The game I liked the most there was Pacman.

I feel sorry for Pac-Man on the Atari. Good game, but just far too limited on the system.

My favorite will always be NES, and Commodore 64 coming in second.

I had a NES after the ATARI system and that was my favorite of all my life...

REALLY ?