It really depends what you are good at. If you know your NFL, then TD Tally would be the way to go.
If you know sports in general, then try your luck at the Pick or Punt game.
I like quizzes so for me, KO Trivia works best.
I really enjoy the Gold Streak game, & that pays well on MRP.
Play what you enjoy most so you can have fun as well as earn points. Of course, why not try them all?