OCD things you do in games.

[BumblebeeCody]

I dunno if I would consider them OCD but:

Reloading after every kill slot is the best though. No need for running out of a clip when you need it and when you need to gun some enemies down, you know we won't here that 'click'. Smart if anything....same though. It's the worst in RE6 Mercenaries when you don't reload often.

Having a clean inventory. Fallout 3 drove me nuts because you pick up so much crap. Everything I don't need or isn't that powerful MUST be sold. Having a messy inventory makes me....twitch. Currently playing Darksiders 2 and I pick up everything, but sell it all and only keep that one weapon part I am using, or keep the super awesome boss weapons. Borderlands 2 was the WORST. So many rare shields and guns such as: Gearbox guns or items given from the previous Vault Hunters that I wanted to keep, but my inventory and bank were full. Getting the shakes man.

Currently playing Black 2 and if one of my Pokemon get Paralysed, I'll exit the cave; no matter how deep I am into it, and go to a Pokemon center to heal them. That's if I don't a have a berry/spray/item to heal that status.
Also on Black 2, need have the Pokemon with perfect IVs. Anything less than 31 gets killed or beaten.

Games like DmC, if I screw up a combo or the enemy placement is wrong, I'll restart that area(even if it's after 3 seconds of playing) till I get that perfect combo.

If I really like the game, then I MUST have all the achievements from it.

Then I guess when doing a speedrun, a single eff up means a reset, even a small 10 second loss really gets to you.

I also save twice on most long games. Zelda/Borderlands/Pokemon.