Back when I lived in Queens I used to use various apps like Skout and Badoo prior to tinder being a thing to try to hook up with girls. One time I was messaging back and forth with what I thought to be a blonde girl and arranged to meetup at her apartment in the middle of the day. I should have known getting offered a BJ like that what I should expect. I walk in the door that they left open and into the bedroom. In the bedroom is a dude with a ski mask on, turned against the wall and in a sissy voice says just put it in my mouth. I said WTF and walked out.
That being said, I have had a few experiences with Trans girls, pretty much exclusively BJ's. Hands down best BJ i ever received was from an asian trans who was pretty cute and passable. I nutted 4 times (in my 20's) within half hour and went on my way.
So, I think the question is missing an answer. I would let a trans blow me, but the thought of a dude is disgusting to me. I know, sounds crazy but fuck it, we are who we are and get turned on by what we get turned on by. Being 100% honest if I could get BJ's daily from girls I would go that route for sure, but sometimes in desperate measures it is 1,000 times easier to arrange to get sucked by a passable TS.