Oooh, Morrowind was a GOOD one. No hand holding tutorials or waypoints as you wandered aimlessly through a mysterious, ashen land... I remember using alchemy to make some super skooma that made me run so fast i crashed the game. It's also the first and last game i tried to mod, with disastrous results. I had a lewd companion mod and thought "Why not have TWO busty chicks following me?" and got to work. Once I booted up the mod it became apparent that I fucked up, because my companion was singular and angry with me... Then I looked across a river and saw her standing on the shore. Confused as to how she got over there so fast, I turned back to where she originally was only to see TWO of her. Then I looked back across the river and saw even MORE instances of her... And then the bimbo clone army descended on the town trying to kill everyone and each other. I prudently decided I had no idea what I was doing at that point, and that maybe making mods is not for me.