Seeing as I don't really know how "good" any choices are, I've mostly been picking things based on if they "feel" like the character I have in mind. She's a Tian Fan-Dancer, who wants to get away from the seedier aspects of that life and go adventuring. She's almost done, but I've struggled a bit to make sure I'm doing things right.
With Lavina I'm mostly going for the dichotomy of a chubby halfling who can, if she so chooses, potentially leap over a house. I won't be doing tons of damage until specialization kicks in, but that's what figuring out a new system's all about!