Nice bit of nostalgia!

The first game I ever owned was on the Spectrum, but I had several at once so not sure which was the first one i actually played.

First game I played a home system was Manic Miner on a friends Speccy.

These topics make me feel old... one of my earliest memories is taping overlays onto the TV screen to play my aunt's brand new Magnavox Odyssey. First game that I owned was a Pong system in the mid-70s.

The first time I ever played a game would have probably been an arcade game at a local pizza place but I have no idea what game it would have been.
As far as at home my sister and I got a Gemini (2600 clone) for Christmas one year with Mouse Trap, Donkey Kong, and Ms. Pacman so it would have been one of those three 

Thanks for sharing Doug!