Yeah, tastyblood is definitely genetic; in Midnight Sun, Edward even notices that Charlie's thoughts are a bit fuzzy and hard to read, so that's genetic as well.

I could totally understand Bella being like, "Hey, my father smells really tasty, that's going to be something of a complication, but I vampire better than everyone else, so that'll work out." The way it was described, though, was really, really sexual and ugh.