Almost no one hates her here. At least it's very rare to see bad comments about her.

^Exactly. While every other princess gets hate, and I have seen Mulan get hate, it's still much less.

or Mulan.

Fortunately, Elsa is a queen, and she doesn't need to be "considered" as a princess. So, she's in a class of her own. Even with the hate she gets, people do show her some respect on here.

I completely fail to see how Ariel would love this place at all. In this club, they mock, revile, and curse at her for her hair, her clothes, her personality, everything she ever did, and for every choice she ever made. Nah. I think Ariel would be the first princess to leave this club/place, just as she left the sea and her family's very parochial/conservative rituals ( in a hurry).

She would just love to talk to anyone and everyone here, making new friends

I thought the question meant "which DP would most like to take part in Fanpop activities" more than "which DP would feel best about Fanpop's views towards herself", but if it's the latter, then I'd pick Mulan.