You have a serious tendency to be conservative with ammo for your uber weapons, even when you run into situations where life is hell if you don't use them, because you might need them later for something really, super hard. Like, some giant enemy crab monster that you can't beat with Shotty and Pist. Then you beat the whole game without hardly ever using them but tripping over x20 more ammo for them than rounds used....
Or instinctively trying to reload every time you use something, regardless of what it is or how many you have left....
Or wondering why the characters you're playing aren't being healed to full in under a second after every fight and why you're not always above 99.85% mana/MP, even when chain casting. Until you remember you let your WoW card run out for a while, to do you some good, and aren't playing your Shaman right now...