I use Mturk, SliceThePie, ChatAbout, PaidVerts, Gomez Peer Zone, and Bing Rewards. I don’t really like paid surveys very much, since I rarely qualify for anything, but TellWut’s surveys take about a minute or two at most, and don’t have any qualifiers.
I’m also picky, because I don’t really like gift cards that much. I need money for grocery and bills, you know?