Starting to open up to it, but it's generally not my thing. I think it's going to depend on the relationship that the characters have. I lean more on the intimate relations rather than the trashy ones.
As long as they are cute and i don't have to fiddle with the dick, then i might choose them. There's few games that has had really good transgirls as LIs, like Midlife Crisis.
I like traps better generally but that's mostly because the proportions on futas are often so ridiculous it ends up making me laugh. There's some great futas and terribly drawn traps out there too though.