Title says it all, what was the first game you remember playing and had fond memories of?
For me it was the PS1, and hearing the OG Crash Bandicoot theme song never gets old for me, got it as my ringtone too!
Pong for me too but on a Sears Sports Center pong console:
DEC PDP 11
Everyone else posting about Atari 2600, C-64, and NES. I think you may also win the thread on the only still supported platform with PDP 11 support extended to the year 2050.