Well, Applejack reminds me of myself. Honest, valuing of family, proud but not a loudmouth. I feel like out of all ponies, I'd get along with her the best.
Also, I think her accent is cute.
As for Rarity, I'm not exactly sure why I find her attractive. She has traits that normally I wouldn't like. Namely being very girly and prissy at times. But she can also be really funny at times, and she has such a huge personality. Not to mention that she's one of the more beautiful ponies out there.
And, like Applejack, I like her accent-type-thing.