Here are my favorites that are legit and actually pay, starting from my favorite: Opinion Outpost, Your 2 Cents, Great Opinions, HCD Surveys, American Consumer Opinions, and 20/20 Research.
Here are the ones that either don't pay OR are just not worth it: dollar surveys, lightspeed research (been known to not pay), AW Surveys (scam), squishy cash, survey head, and cash crate.