Although I briefly had the NES, and not-so-briefly had the SNES, cost of the games was always kind of prohibitive, and much of my console playing was done with weekend rentals, which didn't entirely stick with me.
I had a pretty good run with the early days of Shareware games (Apogee and its like), even learning how to use BBS servers when I was six to download the things like your Commander Keens, Duke Nukem (the side-scrolling one), Wolfenstein (which I had to mod all the textures of to make the nazis into robots/zombies, because I wasn't allowed to play games killing people, lol), Doom, etc. Also buying those silly 100 shareware games/demo discs, which was where I ended up playing a demo of one of the Ultima games, which became my first real PC game (in the 1-6 Compendium Box set released at the time).
After that, I mostly kept up with the RPG genre, including Wizardry and the Gold/Red box D&D games. Aided by my other becoming interested in them too, which led to more getting bought. Some dabblings in Warcraft and Heroes of Might & Magic threw strategy games in the pile as well. Real-time started overwhelming my mom's ability to play the strat/rpgs, so she became more of an audience.
My own early job delivering papers, and pressure from friends led me to get the N64, which became my system of choice for the last of my childhood, racking up many completions of Star Fox and F-Zero, and some ungodly (I think over 1000, maybe even 2k) hours in Perfect Dark.