Yes, I know it's a classic, but I never really cared for OKLAHOMA! at all (Exception: "Out of My Dreams"). I have something of an aversion to any musical in crinolines, especially if it has an added air of gosh-darn-yee-haw Ameri-corny that was rampant in musicals from the 1940s till the '60s.
Favorite R&H is SOUTH PACIFIC, followed by STATE FAIR (Americorny but set in the 1940s), KING & I, SOUND OF MUSIC and CINDERELLA. Individual songs I love from other shows are "No Other Love" and "The Gentleman Is a Dope". I only REALLY loved the latter after hearing Christine Ebersole's version, which I think beats the pants off Lisa Kirk's original (heresy, I know).
"Christ, Bette Davis?!?!"