m.m.m.m.me too
I think I freaked my mum out when she heard noises at 6:00am, it was just my 7-year old self who was desperate to find out whether SIN and COS would let me PLOT a circle on my birthday present ZX81.
We only had one telly so that was my only opportunity...
I could probably key that program out on an emulator without reference to the single-key commands, even now. J = load, A = new etc.
40-odd years later still nerding away; it's not a job it's just a hobby someone pays you for!