I really can't stand it (at Gamestop or anywhere else) when employees come up to me and ask if I need help. No, I know what I'm looking for goddamnit, and if I'm confused, I'll ask YOU.
And to GS employees everywhere:
Geezus fracking Krist, most gamers who come into a GS know something about video games, including me. Don't freaking lecture me about what games are good and bad on (insert system here). I'm just gonna start carrying a bundle of my NWR business cards around, and start handing them to GS employees who start talking to me.
I'm never lectured when I go into my favorite Gamestop, they respect me.
This.
I'm sure I've related this story before, but I frequented a Gamestop during college and they were never a bother to me. They were always courteous, and whether or not they greeted me depended solely on whether they were in the middle of helping other customers. Also, since the regulars there knew me from the list of only Wii and DS games I'd pre-ordered, they knew that I was a veteran of many console wars and could probably hold my own in any flame war. &P
At my current indy store, they actually do offer me additional items of interest. This is understandable, I don't begrudge them trying for add-on purchases. Bawls drinks? No thank you. Imported White GC Controller? YOWZA! ... I bought that 4 months after they first showed it to me... I caved T_T. But it's always friendly there too, like when I pre-ordered Muramasa the clerk related how he had also pre-ordered it himself. Or they show me the latest shinies they got from Japan... like that White GC Controller...*drool* But yeah, they very readily take no for an answer and treat me with respect.