How do cis gay men feel about trans guys?

I'm an ftm and I was wondering, if you were going out with a really great guy who you really like, but you've never had sex with him, and one day, the guy tells you he's trans. In other words, he has a vagina and might still have boobs. How would you feel? Would it be an instant 'nope'? Only honest answers, I'm not posting this to find answers to make me feel better about myself, just curious and wanting to know what reactions I should expect from guys. And no, you're not transphobic if you say it would turn you off.