(All male)
Bondage
Vore
TF
symbiotic fusion/bondage
musk

All things I would write.

Bondage - Adore it. A big buff guy squirming in leather.... yum~
Vore - honestly don't see the appeal of it. I don't dislike it, I'm more curious than anything else.
TF - See above. Had a chance to write a bit of it, it can be fun, but usually I enjoy it more for the other things the transformation entails, than the TF itself.
symbiotic fusion/bondage - I could see it being fun, but it's pretty much in the same place as vore is.
musk - Yum~ At least, when one party's reluctant, forced to breathe it in, unable to stop from getting horny... That I like up to extreme. And for lesser amounts of manscents, it's always fun to play with.

Muscle
Domination (over you)
Spandex
Vore
Foot

Muscle - Nnnfff. Yes please. Whether it's a twink taking control or getting bent in half forcefully by a muscled mountain or it's a pair of chiseled gods, I absolutely adore.

Domination (over you) - Depends on my mood, but on a day I'm tired... Mmrrrr <3~

Spandex - Not many fabrics make for sexier tents, oooh my~

Vore - see above.

Foot - I'm in a weird place with the foot fetish. I thoroughly enjoy reading/writing it when it's used for humiliation purposes or domination of some sort (public humiliation, forced musk play, denial/tease/edging, etc) but when it comes to willing footplay I get bored of it. Someone willingly sucking and licking on footsies just doesn't interest me, really.

Spanking
Rimjobs
Public Humiliation
Edging
Hypnosis

Spanking - Adore it. One party holding another down and painting their buttox red till they're crying in pain and humiliation >3

Rimjobs - Also adore it (clean ones, at least). Mostly the forced kind. Both the "Oh god don't make me put my tongue up thnnnfngnnfgf" kind and the "No no no no don't touch down there I'm not-aAGgnngnhggfffff" types.

Public Humiliation - Nnnnfffff absolutely absolutely adore it.

Edging - Yes yes yes yes yes. All flavors. But ESPECIALLY the following ones:
1 - The "oh god please don't make me cum" trying to keep from going over and making themselves edge instead, and the
2 - "Please please please let me cum let me shoot oh god pleeassennghaAAAghngnnh" torment type.

Hypnosis - More I see of it, more I like it, but less so the fully obedient slave type, and more the half conscious pumped with triggers and orders, unable to control themselves type. (getting horny, or unable to stop from following orders when it's the furthest thing they want, for example.)

Facesitting
Teabagging
Latex
Coiling
Breathplay

Facesitting - Yes, but mostly in a humiliation (Or, if the unfortunate soul is unlucky enough to be so sensitive/obssessed, teasing) fashion.
Teabagging - Eeyum, but even moreso with an unwilling victim (or at least reluctant)
Latex - Fun, I guess. Didn't do much with it.
Coiling - Essentially, see bondage >3
Breathplay - Fun to use in humiliation/control scenarios to force an action, but I don't really see the beauty of it for it's own purpose.

Prolapse
Fisting
MPreg
Castration/Ballbusting
Male Lactation

Prolapse - nothing for or against it, I guess.
Fisting - nothing against, and I occasionally see the allure ( usually involving a smaller dominant taking charge)
MPreg - doesn't really do anything for me. If its about the shape, it's basically just chubs. If its about the actual being inside , bleh. I'd write it, I don't hate it, but like prolapse I don't have anything for it either. (Oviposition / egg stuffing falls in a different category)
Castration/Ballbusting - castration doesn't really do anything for me, but non permanent ballbusting is absolutely fun when it's used As a teasing/ denial tool. When the victim enjoys it, I don't see the allure.
Male Lactation - it's fun, but mostly as a conduit for teasing, overstimulation play, or humiliation.

Breathplay
kicked/punched/bruised etc
Sucking off someone who is being tormented
Forcing the victim to suck YOU off!
Rimming

Breathplay - see above
kicked/punched/bruised etc - I do have a few characters who indulge in bruising and beating as part of their sexual gratification, but it's more for flavor. I myself don't see anything wrong, but not that much allure either.
Sucking off someone who is being tormented - depends on the torment, but oh, absolutely
Forcing the victim to suck YOU off! - depends on the mood, but great fun >3
Rimming - see above

Oversize Vs medium
Creative positions
Loud Moaning
Torture teasing
Romantic Brutality

Oversize Vs medium - not sure I understand. Like, overweight? or just plain huge?
Creative positions - Can be fun, mostly bondage related ones
Loud Moaning - Fun, especially if the loud one's trying -not- to be >3
Torture teasing - If you mean teasing with torture, not that much. If you mean teasing until it's torture, oh absolutely hell yesssss.
Romantic Brutality - Doesn't really do much for me.

FEMALE Muscle/FMG (Female Muscle Growth)
Tentacles/Coils/Vines
Multiple Testicles
Sexual Vampirism
Transformation
Massive Breasts

Best way for me to explain the first one: My favorite superhero? She-Hulk, closely followed by Wonder Woman and Rogue (see #4).

FEMALE Muscle/FMG (Female Muscle Growth) - I like muscles, the process of muscle growth is... eh, not good nor bad, I don't really care one way or another (although in certain situations , like when it leads to sudden femdom, it can be pretty cool)
Tentacles/Coils/Vines - See Coiling above, Yum~
Multiple Testicles - Unless it's related to extra face smothering or something similar, I don't really see the purpose, but more things to play with can't be wrong
Sexual Vampirism -
Transformation - I don't really have an interest in TF for TF's sake, but it can certainly lead to entertaining things
Massive Breasts - only if they're used correctly. Small breasts are generally enough for me, but like FMG above, it can lead to fun femdom thing >3