Talents are what gets me. They are so rare (you only get to choose one more at level 4) it is annoying to pick up a companion and get a useless talent that you would never in a million years have picked.
I'm playing Sebille as Rogue. I just picked up the Red Prince and Lohse as Cleric and Inquisitor (I think, perhaps Cleric and Shadowblade) and got Comeback Kid and Hothead. Both of these talents are far less use than what I'd have chosen to put it mildly.
Now I don't have PetPal so unless I want to wait until level 4 I'll have to go and pick up Ifan and go through every class and see if any of them offer it. And then take him with that class - whatever it is.