In 1982 or so when I was 2 years old, my older brother got a Spectrum Z80 for Christmas. I remember playing JetPac a lot, and I sort of liked the rubber keyboard. Always lost to my brother in 2 the player mode, but then, he is 9 years older than me.
Tried JetPac again a few years back on an emulator. Still a fun game, and I've got much better in it.
EDIT: So, it's been 25 years now. Whee, time flies.