I loathe shopping in places that pay commission. I feel so guilty if I don't wind up buying anything.
One of our local furniture stores makes their salespeople stalk people around the store. So even if you say you aren't buying and just looking they still have to follow you.
They look miserable and it makes me so uncomfortable. Whenever I go in, I wind up rushing out as soon as I see what I need to see; that way they are free to move on to a customer that is actually planning on buying that day.