I don't do it myself, and maybe it's not that weird since I know many ppl does it but I still find it funny. My girlfriend while playing Mario Kart when she wants to turn she physically turn and move the controler all the way to the point where it's almost at the face of the person next to her, despite her playing with a controller pro controler and not a wiimote.

If it's really atmospheric or scary or it's a game that's really important to me, I can only play when conditions are perfect. Nighttime is good, a rainy day is perfect, and no one else can be around. Because of this it takes me ages and ages to get around to playing/finishing some games. Drives people crazy.

Good man, I do the same whenever I can. That's really the only thing I can think about that might be "weird".

Weirdest thing I do is read character dialogue with over-the-top voices.

I do that with every racing game!

When gaming on my PC and I get to a new level or after finishing a battle, I usually make an Alt+Tab and browse the internet for 5-10 min to relax, and then go back to the game.

Sometimes I go on to the menu screen and move the cursor in time of the rhythm of the game music.

You will love Mega Man X4 then!

I always backtrack if I take the right path on my first try... i actively seek the dead ends. I get so uneasy if I feel like i left something behind.

Hmmm, a lot of games that don't actually have a story (or the story is so dumb I don't care to hear it) I will turn off the sound and listen to an audio book while I play.

I also enjoy watching sex scenes if the game features them. Don't ask me why, no matter how cringe-worthy they can virtually look or be, I tend to actively engage my character in these sequences if they can be pursued.