Gaming

Magic Carpet was my favorite dos game I think, that or Loom.

Magic Carpet had you flying around on a Carpet, blasting fireballs at snake things, collecting mana orbs, building castles, and destroying castles of the enemy.

Loom was a Lucas Arts game where you played as a "can't look at the face of" mystical weaver of reality.. Dude under a robe with a Hoodie. You pick up a Magic staff, learn combo's of letters to play on the staff (I had a little notebook next to me with them all written down) and the game got absolutely wild. Fabric of reality breaking sorta wild.

DOOM

Kings Quest games for sure. IV was the one I played the most, it was a buggy mess, but I loved it.

There was a very basic 2d game where you flew a plane over a simple landscape... You got points for blowing up some silos but lost points if you shot the cows. Can't remember the game but spent hours playing it.

Tantalisingly it had a 2 player network option, but I think it needed some rather non-standard network hardware to work.

If anyone can remember the name I'd be grateful :) Just thinking about it makes me happy!

ZZT was an amazing game where you could make your own games and program "objects" using a simple scripting language. It was my first programming language.

It was Tim Sweeney's first game. I've never played Fortnight.

Carmageddon

Bunch of greats mentioned so far. I was a big fan of an older game called “Millenium: Return to earth” in which you colonized the solar system. One of the few games I had that came on the larger, five inch floppies.

I cannot remember the name but you got to choose between a boy character and a girl character and each stage you had to get all the collectibles to open the door. It was a 2d platformer as well.
Edit: Turns out the game is called Word Rescue.

Indiana Jones and the Fate of Atlantis Truly a masterpiece or maybe I have rose tinted glasses A real puzzler with a decent amount of replayability

was road rash on DOS? played that a lot. wolf 3d too.

Wing Commander Privateer - I love a good economy game in my spaceship game.

Mechwarrior - Battletech 1st person. Get you a 30 foot tall robot and shoot some lasers at other giant robots. Go for the knees.