I happen to like those sales people who are not pushy nor fake but just being polite and helpful only when you asked them for help. Honestly, I know most sales people have quota to struggle with, and it does reflect to their overall pay check (some might even get fired if they're considered ill-performed by management), I just thought they're still doing their job to survive. Working based on performance level in customer service area is certainly not fun, I would say.
The only problem are the ones who give you "the look" or poor attitude (playing invisible) just by judging what the customer wear. I thought that's pretty lame.