I didn't own a computer until the early 2000's when I commissioned a AMD64 bit PC, now I have a Pentium i7-720 with 18GB RAM (2 banks of 3), 1030GT graphics and 2x1TB spinning rust - as prices drop I may get a new build aiming for best bang for buck type design that will also last 10 years or so.
One of the early machines I cut my teeth on was the
Altair 8800. My dad would also sometimes bring machines home from work (ICL) that I learnt various BASIC's and O/S's on.