Slightly.

rapunzel cracks me up with her indecisive moments

I never laughed at Ariel.

she makes me laugh when she's on the land... her facial expressions & mannerisms are endearingly funny.

rapunzel's humor is too forced for me.. not just her, but the whole movie in general

I laugh so much when I watch Tangled, Rapunzel is quirky and excited, it's hilarious.
Ariel's funny, but Rapunzel cracks me up non-stop.

I don't find Rapunzel that funny actually. I actually think Mulan is the fumiest.

Rapunzel is funny in a sense that the movie directors/writers for ONCE were not afraid to subtly mocke the princess in a DP movie as well as initiate laughs at her expense and the expense of her love interest as opposed to other DP movies that usually bring up background characters for comic relief (often the ones that are not particulary good looking). Tangled in many ways challenged that tendency with Rapunzel and Flynn, not being afraid to let them look ridiculous or silly at some points - in fact, sometimes by far more ridiculous than their animal sidekicks Pascal and Max.