Ariel has many flaws but she's still my favorite DP.

Sure I really dislike so much of what she does but I still really like her overall.

I just adore Aurora.

I would have voted for jasmine, but I like her flaws, and I never hate those type of personalities. Otherwise, I don't know

If I had to pick, I guess

I agree with Jayden-G, I would have picked Jasmine too, but I like her because of her flaws.

Insecurity, low self esteem, low trust in her own abilities - yet I love Mulan.

All I think she needed to do was apologize at the end though she did give a quick one when she was about to be turned into one of Ursulas creatures. But I do think it was more so Triton than Ariel.

Pocahontas, Aurora ad Ariel. Though I'm more of the type to love them for their flaws.

Well, right away I'm not so sure but I'd say I "hate"(= I don't appreciate very much) oversleeping or being always late. Of Course sometimes I'm late and sleep long mornings but when I have to be on time I'm in time, it's not a problem. I'm actually a morning person. But still like no one knew I loooove Mulan :)
I think there's other princesses too and I'll put them here later when I remember them.

Though I mostly like her (and my other favourites) because of her flaws. But Ariel's flaws could be particulary annoying if she hadn't some good traits to balance them out.