Depends on the situation. If there's time I ALWAYS reload, I can't stand needing just a couple more shots to finish off an opponent and running out of ammo. If there's lots of enemies around that are easy kills, I'll be a little more liberal with it and take them out. My fiance never reloads, will run through whole load zones without reloading with like 2 shots left and it drives me insane because she sees an enemy then, fires twice and then reloads and the enemy takes cover. OCD? Maybe, but I always have a full clip ready for the next one. Comes from playing Halo for so many years.