I don't like randomness in games - or, more that I don't like when randomness makes your actions not matter. You can position your soliders perfectly in the XCOM remake, but if the game doesn't feel like letting them hit their targets, then it doesn't matter what you do.

RPGs are traditionally very randomness dependent. Wherever the games Tower of Torment is emuilating would have rolled a die, I have the player play a minigame instead.

Strength and agility based actions are powered by a timing minigame; technical tasks are decided by Meavis Beaconing it up, and magic makes you do math.

I want the hardest wizard spells to make you factor binomials.