You are making me feel old.
First games I bought when I got my PC were X-wing and Doom 2....I say "I", it was probably my Dad who got them for me since I was only 12 at the time.
X-wing had already been out for a year at that point, but this was in the days you could go in to a shop and see all the nice big boxes on the shelves.
Hey, you're only like 6 years older than I am. I just got into PC gaming after exhausting my SNES, Megadrive and Amiga.
Saying that, was Amiga gaming the PC gaming of the time? I was only about 6 or 7 when I had an Amiga.