I play on easy on most games. The reason is usually I do not want to die. However for Elder Scrolls Its because I want it to be more realistic killing people.

I play medium with FCOM. The satisfaction is greater when I actually manage to slay people and get away with it without having to rely on a well-timed claymore to the neck.

I play on default medium. I like to play a glass cannon mystic archer. No problem killing quickly on medium difficulty. Then I gimp her defense (things like permanent endurance of 30 and single digit armor rating etc) so that medium enemies are very dangerous to her. The result is just what I want: She can strike like a dragon, but crumples like a butterfly.

I play OOO and I like the difficulty of medium. It works well and stuff isn't too overpowered nor too underpowered. The bosses also are quite hard.

75 % Difficulty, Normal difficulty until level 5.