I nearly always think up a story to every battle i play. in detail, thinking about how each of the different units to die or act heroicly would be rewarded or honoured. After one battle with my warriors of chaos i had a brilliant mental image of my general screaming his head off at a unit of chaos warriors that had failed a break test, before finally having them double decimated and flaying the unfortunate 20%, tearing the flag off their banner and puting the skin of their brothers on the pole instead. as a reminder of what will happen if they ever show such cowardace again.
other than little asides like that i never fail to make engine sounds when moving vehicles in 40k, squelching noises while moving spawns. and when i played vampire counts i would call out "BRAAAAIIIIIIINSSSS!!!!!!" while charging with zombies.
I'm not that much of a freak am I?