Credit goes to  M-P-L for this idea.

Guide:
!! = very enjoyable
+ = enjoyable
/ = somewhat enjoyable or iffy about
- = not very enjoyable
x = not enjoyable at all
? = unsure about

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Anal on Males: x
Anal on Females: if they enjoy it, then +
Breasts: + (what guy doesn't like them? :P)
Breast Expansion: ++
Weight Gain: -
Bondage: -, but am willing to comply if that's your desire.
Clothing: x Kind of hard to have sex with your boxers on, isn't it?
Muscle, Male: x ...I'm a GUY.
Muscle, Female: -
Herm: if fem-dom and pregnant, then +; / for fem-dom and not pregnant, x for all others.
Cub: x That's just sick to me.
Baby: x
Diaper: /
Transformation: -
Macro/Micro: /
Impregnation: +++ Moar pleaze!
Pregnancy: !!
Unbirthing: !!
Lactation: ++ (if pregnant, then ++++)
Standard Soft Vore: -
Standard Hard Vore: -
Anal Vore: -
Soul Vore: -
Cock Vore: xxx
Paw/Foot: -
Incest: / if consentual, x otherwise
Twincest: as above
Clonecest: depends on the subject, so ?
Yuri (F/F): +
Yaoi (M/M): x
Hetero (M/F): /
Bisexual: + if female; if also pregnant, then !!
Girly Boys: x
Tomboys: /
Mind Control: x
Rape: x
Uniform: x
Orgy: + lotsa fun!
Subbing/Domming: -
Biting: x
Solo Masturbation, Male: x
Solo Masturbation, Female: - Where's the fun in that? :c
Scat: XXXXXXX
Watersports(pissing): XXXXXXX
Inflation: ? depends on where and what with; if male, then -
Fat/Pudge: - It's fun to squeeze, but it's not a turn-on for me.
Tech: ? Ever done it with a robot?
Glasses: -
Tentacles: /
Oviposition: ++++ I count this as part of pregnancy. :3
Masochism: XXX
Sadism: XXXX
Partial Nudity: if female, then +++
Gore: X
Snuff: XXXX
Hyper: if pregnancy (no fear of bursting), then +++; - or X for all else
Zoophilia: -
Electricity: x
She-males: x
Cross-dressing: x
Oral: +, if recieving
Asphyxiation: x
Spooge: / it's tolerable...
Tickling: ++ What fun! :P
Vomit: XXX
Body hair: if human, then X; all else gets +
Facial hair: -
Mature (older) men/women: -
Skinny figure: -
Needles/pricking: X