Michael Wu and Kevin Wu (left)
ages: 58, 20
hometown: Sugar Land, Texas
why i like them: Father-son duos are always special. Plus, they both call themselves "Internet entertainers." You know what they say: Fathers and sons who Internet entertain together ..."
negative point: Michael is "not really comfortable in a competitive situation."
Nat Strand and Kat Chang
ages: 31, 35
hometowns: Scottsdale, Ariz; Santa Monica, Calif.
why i like them: These friends are both doctors (smart!) yet don't seem to be Meredith Grey-ish at all (notably, they smile and like doing things outdoors).
negative points: Their names rhyme; Nat would switch places with "the Dalai Lama or Heidi Klum," which confuses/annoys me.
Chad Waltrip and Stephanie Smith
ages: 26, 23
hometown: Fort Lauderdale, Fla.
why i like them: A really, really cute couple who hopes to grow during the experience. Furthermore, Stephanie's a champion swimmer and a former Miss USA contestant.
negative points: I'm wary of anyone who'd want to switch places with Matthew McConaughey (Chad, no!) and Celine Dion (Stephanie, seriously rethink that!).
Photos by CBS