TLDR this thread because I see it already getting a bit derailed in the first few posts.

To answer the original question...

I don't really care about the sexuality of the male performer so long as the girl looks awesome and the sex is great. Chemistry and a bit of attraction between the performers goes a long way to sell the sex.

Now...men who LOVE tgirl cock are as much a deterrent in porn as men who scorn it.

Ultimately, this is why my preference for transporn is simply Solo > Lesbian/Transbian (i.e. any girl on girl action whether there is 1 cock or many) > scenes with dudes.