I'm sure I twitched or screamed while playing the first Resident Evil game when it originally came out. Not a habitual thing though.

If by that image you mean to call me a crazy Samuel Jackson acting mofo, I'm cool wth that.

I'll do the three Baiken's overdrive slash in real life if i know it's going to kill the person i'm playing. Only if its a real person. Or the tatami gaeshi, or any other move.

Ya, it's a habit for me to do what my characters are doing in fighting games. It's actually a tonne of fun......

I shift my weight a lot, 'cause my legs fall asleep, or I'm slouching too much.

I don't know if I make excessive movements nowadays, but I remember doing that a lot when I was a kid; especially Super Mario; whenever I was about to make Mario jump, my legs would tense, and then press the button extra hard. I also made a little jump as I'm sitting. It's kinda hard to explain, but I guess the motion is similar if you got startled or something.

I think I'm more twitchy when I'm playing adventure, action, music games than RPGs.

yes i do i got to the point when i started to Mimic Cloud Strife from FF7 for a while and started to learn how to use a sword lol not only that when im excited about a boss that im gonna kill i talk to myself as if there is someone there and i go to kill the boss and i make the same noises Tidus makes when he get's damaged on X lol it's really funny but i feel kinda embarrased telling it to people but oh well it had to come out sometime :D

haha. Yea I do that alot. Like if one of the monsters in the game goes to hit my character, I sometimes flinch. XD

I just found out I do it the same, only discreetly. We were playing GT4 on splitscreen which of course reduces a bit the overall view of what is in front of you especially when you use the camera placed behind a car... so I tried to helped myself. I rose my head a bit hoping to see better from above the car, didn't worked though :)