An Options Gamer is a person who has to adjust the settings first before even playing a game rather than after to see if settings need to be adjusted. Also applies to people who have to look at the options without changing them before playing a video game.
"Hey babe, how come you haven't started the game yet?"
"Sorry I just have to make sure the settings suit my monitor and if all the sensitivity is right!"
"Why don't you wait to play to see if you need to change anything?"
"Look, I just know okay"
"Ugh, you're such an Options Gamer"