I'm not as old as some of you, but my Dad was a teacher and in the mid 80s he used to bring home his department's BBC Micro (for the benefit of those of you in the States: http://en.wikipedia.org/wiki/BBC_Micro) for the duration of each school holiday, so I 'learnt the trade' playing Frogger, JetPack, Chuckie Egg & more on that, In fact my school also had one on which I learnt BASIC (and quickly forgot once I discovered girls) and in 1988ish I actually chatted to some fellow school kids in the States via a contraption called a 'modem'. Occaisionallly Dad was able to pinch the art department's Apple Macintosh (yes, the original), not many games for that but we were able to draw pictures with this crazy device called a mouse, and you could use, like, FIVE* whole colours!
I had spells of going to freinds' houses to play their 2600s or Sinclair ZX81s, my first gaming machine of my very own was a second-hand Commodore 64 (RIP Jack Tramiel) bought by my mum one birthday, but my fondest gaming memory remains to this day the day I took six months-worth of saved-up paper-round money into town and bought a brand-new SNES with Super Mario World, the smell is what remains with me the most and is the memory node in my brain that is triggered every time I crack open the celophane on a new game or new peice of tech!
Since then I've had Sega Megadrive(Genesis), Gameboy, Commodore Amiga 500, Playstation, N64, PS2, PSP, Wii, PS3 and Vita. (plus various PCs but never really got into that as a gaming platform)
I'm not one for nostalgia and generally find fond memories of childhood are often best left as exactly that, that goes for TV shows as much as video games!
Bizarrely I did once have a week playing almost nothing but what I think was a CalicoVision in around 1994, I went on a school exchange trip to Germany and the family I stayed with had one in their basement, given I had the MegaDrive at that point I found the experience pretty hilarious but quite a lot of fun!
*That's a guess, I can't actually remember how many colours.