In-game or IRL, do you have any unusual things that you tend to do while you're playing?
For example, I notice that I tend to have running commentary in my head as I play certain games (kinda like I'm livestreaming the game to my inner subconcscious. Been doing it since eons ago.); especially if I get really immersed in them. Basically, it's like I have a running copy of MST3k or Rifftrax going on, except composed of my personalit(y/ies). It tends to get funny during certain races or FPS sessions I play. It gets somewhat ESPN-style with some games (Unreal sometimes, SpeedRunners and such at other times), to just plain silly (Quake).
Speaking of Quake, my inner-metalogue decided unanimously, by context of commentary, that I go through Quake (Hard Difficulty) like I'm Old Man Henderson to the point of nicknaming me that the whole playthrough like obnoxious siblings (that, or a(nother) meme just started within my subconscious, and it could go Inception on me.). On the plus side, it's a complement from myself to myself, and a good way to know I'm insane sometimes (like shotgunning a shambler at shambler-melee range, and winning with minimal damage taken; oh, and with heavy knights also on the prowl).
EDIT:
One other tidbit I almost forgot. Apparently my immersion experience was far better when I had the resolution at minimal, rather than maximum. It's odd. With Planetside 2, I need a high resolution with crap rendering to see, and play. But with Quake, I need it for nostalgia. Somehow, I played far better with a crappy resolution setting (like 320x280 on a 1280x1024 screen), than the highest. It must be a nostalgia factor.