Loving these polls, BTW...
Straight Transformation (ST), 5, I gave this a 5 because while I love TF, context is super important. So a random scene of a woman walking down the street and then 'poof' she's now a poodle is not super interesting to me.
Realistic Transformations (RT), 2, I remember a Changing Times Podcast episode with Dragoniade in which he was very adamant that TF should always be realistic. I don't share that philosophy. *lol* Even for feral TFs, I prefer some non-realism, such as exaggerated sexual features. Arania's Debby Donkey sequence is a perfect example of what I'm talking about.
Hybrid Transformations (HT), 5, I gave this a 5 because I love when it's well-done, but I also like non-realistic feral (see above answer). With that said, I generally prefer my anthros to be less "furry" in style.
Anime Style MG TF (AST), 2, this can be cute but it's really unappealing to me as far as fetish fuel. I'm gonna get a bit up on a soap box here (*lol*), but it drives me nuts that the "Transformation" tag on sites like Exhentai gets added for anything that has a whiff of kemonomimi or someone grows a pair of fangs or whatever.
Smooth Transition (SmT), 3, I'm less interested in this, but I have to give props to my roots as my interest in TF probably began in a lot of childhood cartoons that had this type of TF.
Rough Transition (RoT), 7, I'm not into extreme body horror and pain, but I do like the TF to be a jarring and humiliating experience with parts swelling or shrinking, bones reshaping, teeth growing, etc.—more like Willow, less like Cronenberg's version of The Fly.
Temporary Change (T), 4, I kind of like the idea of permanent change—or at least the belief it's going to be permanent. With that said, I don't mind an "Oh no, the moon is out tonight!" scenario.
Burst Through Clothing (BC), 9, like the other polls, this is almost always a requirement.
Transform Smaller (TS), 4, less interested in this, largely for the aforementioned BC dimension, but I still enjoy a good mouse TF.
Transform Normal Sized (TN), 6, I can dig this as long as there is the aforementioned BC.
Transform Large (TL), 7, dig it.
Aquatic Creature (AC), 2, these are probably my least favorite.
Mammal Creature (MC), 10, definitely my favorite!
Flying Creature (FC), 5, dig these but some kind of fall flat for me.
Reptile Creature (RC), 8, enjoy this, especially if some of the, umm, mammalian features are retained (see above about non-realistic).
Insect Creature (IC), 8, love these, especially if if they have anthro aspects (i.e., Lunate's work) or if they are human-sized or larger versions of bugs (some of Chocolatechilla's work).
Elemental Creature (EC), 6, I can dig these if they are done in a humiliating rather than empowering way.
Object Creature (OC), 7, I'm digging a lot of the dollification stuff ImmortalTom is doing, which I didn't realize I would. Robots can be great too. I still remember seeing Black Sabbath's Dehumanizer album cover and thinking, "Man, if only that were happening to a cute babe!" *LOL*
Demonic/Angelic Creature (DAC), 6, can dig the demon and succubus TFs, less on the angelic.
Undead Creature (UC), 6, this is something that I love in theory but I generally don't love most instances of execution I've seen or read...probably because it's meant to be more horrifying than sexy in those instances. I enjoy Locofuria's vampire comics.
Mythology Creature (MyC), 7, dig 'em.
Plant Creature (PC), 7, love it and wish there were more of it.
Abomination Creature (AbC), 9, really love these ones as well, especially since your imagination can lead to anything.
I'd also add:
Sexual Organs (SO)
Anthro penises, mouths into vaginas, limbs becoming sexual organs, etc.
8, there's a sub-genre of furry porn where characters become the cocks of other characters, which I'm not really into. I do enjoy characters TFed into large dicks, such as Kastle's work or FullMoonMaster's Witch's Curse comic collaboration, or some of Demonman's less extreme stuff where characters sprout countless boobs and cocks.