My wife will likely vote for any Democrat that faces Trump but I can't see myself voting for Biden. Others I don't really care for are Booker, Klobuchar, Castro, and Harris but I just haven't paid much attention to most of the others at this point. I like Sanders and Gabbard but am waiting until the field gets a lot narrower before I really dive into it.
If I don't care for whoever gets nominated then I'll probably be a 3rd party voter again this year.