Okay, so I've worked in sexual health for about five years and I've met around 70-80 ftm guys and maybe half that of mtf women (just a quirk of my clinic, from what I can gather). Some observations. No scientific claims here, just anecdotal.
Most ftm guys are attracted to women. Some are open and a few are (post transition) gay. Lesbian mtf women seem to be a rarity. There are none in my sample and only a few of the mtf women seem to know one. I've never met mysogyny as such, even though there'd be room for it in a sexual health check-up.
Most mtf women don't have surgery for purely financial reasons. For ftm guys it seems to be a mix of money and concerns over quality/nerve damage which will lead to reduced sexual function. Guys want to orgasm, no surprise.
Well transitioned guys aren't easy to spot if you're not specifically looking. They're raising kids in the burbs with their (usually female) partners, laughing in bars with their friends and, yes, enjoying gay spaces without anyone being any the wiser. Mtf women are more obvious, especially in the early parts of their transition. To be fair, most of my patients are white and post puberty. I look at trans women from other circumstances and they're not obvious at all.
I only know 2 ftm guys who've said they have problems with dryness since starting on testosterone. About a quarter admit to being "gushers" since starting testosterone - that is, they get wetter than before. More than one has likened orgasming in their new state to opening a dam on a river.
The successful treatment of GID by transitioning is way up. I'd say over 95% in individuals who have had comprehensive psychiatric treatment. There's usually no evidence of any other issues besides the body disphoria in the happy, well balanced people I see (of either gender) though, again, I'll admit that I only see them for 10-30 minutes at a time, rely on their own assessment of themselves and visits are often some time apart). The ones who haven't had an outside perspective applied seem to be less ... well, balanced.
Modern forms of testosterone replacement do not effect the liver in healthy individuals (I have two regular patients with Klinefelters Syndrome who are all over their treatment. And they love to tell me about it.). We check specifically for BP and cholesterol issues though.
That's just off the top of my head. Honestly, these people are well aware of themselves and their bodies in a way most people aren't. I guess they have to be, or it just comes with the territory. They're often just so much easier to deal with because of it. Except when the ftm guys need a pap smear, then they're all kinds of awkward.