Been thinking about this because I’ve got a few things I like and thought I’d see what others enjoy.
Turn-on is a tough one for me because there’s 3 at the top. Big women got to love the curves and something to hold, pregnant it’s all about the bump and breast milk after 
and rough mainly choking, gagging, spanking and scratching all make me twitch.
Turn-off just going to be blunt scat 
only thing I can’t understand but I won’t judge others for it. Never found anything else.
Turn on for me is mostly scent. I find the scents that turn me on for men are lynx and on women, I like jasmine type scents.
A turn off for me is being too cocky and full of themselves.
Turn on for me is a visual of what I’m about to get an ass shaking or boobs bumping. Turn offs not being able to get hard. Damn ED
Turn on for me would have to be that they have to smell good and look good too 
A right turn off would be that they smell really bad, bad manners, full of themselves and time wasters
Turn on - got to have a sense of humour. I love a laugh and a joke. I would use that rather than my looks to get someone into bed.
Turn off - rude people. Life’s too short to be rude.
Turn ons- Definitely love it rough. BDSM, role play, pretty much everything to be honest
Turn offs - Could never get my head around crossdressing despite its popularity. Different strokes for different folks, I guess!
Turn ons, I have too many to mention, all depends on my mood, but turn offs definitely no scat/vomit, I would hate to be called daddy, I think that’s weird, and 100% nothing with feet!
I have a very distinctive turn off. I absolutely hate skin coloured tights! The look of them, the feel of them, everything. No rational reason!
Also can’t stand pyjamas. Again, no real rational reason! At uni one of my housemates had a girlfriend who would hang around our house all day in her pyjamas and didn’t smell the best. Maybe that’s where it all stems from in my distant memory!
Turn ons? Many many turn ons. I think a woman who is confident in bed really does it for me, especially body confident (regardless of what their own body is like. A woman who knows what she wants and isn’t afraid to say!
Turn ons, wife in heels and shortish skirt showing plenty of cleavage. Also when she talks dirty or masturbates is a massive turn on.
Turn offs, cotton pyjamas which she finds very comfortable.
Turn ons:
I have to many to mention, but on the to of my list is my wife and how confident she is and how beautiful her body is.
Another big turn ons are having my ass played with by my wife, love we she uses my toys on me or pegs me with a nice big strapon or when she is fisting me. I love it when she is dominating and tell me what to do.
Turn offs:
Unhealthy/really rough/high risks sexuals acts
My biggest turn on is probably hands, mainly hands with veins (not chubby) but I also like a chubby guy as a turn on.
A turn off is ears, I think it’s the mouth sounds being so close to my ear that turns me off really!
Turn on is to see my wife smile or laugh.
Turn off? Not sure she has any for me.
Turn ons - intelligence, men in glasses, athletic-looking men, a good finger fucking, choking, spanking, dominant men, giving oral sex, sucking my nipples while fucking me, watching porn with my partner, using toys with my partner, filming our sessions, sexting, responsible i.e. doesn’t leave birth control down to just me.
Turns offs - bad hygiene, rude/arrogant, anal, unwilling to use foreplay/demands blow jobs, receiving oral sex, pounding away jack-rabbit-style, scruffy boxers, period sex, not getting tested regularly.
Turn ons, kissing, groping, undressing each other, mutual foreplay, eye contact, intimacy, enjoying each other’s build up.
Turn offs, rude, ignoring your needs, demanding sexual acts, bad hygiene, rushing to the end goal, selfish lovers, not thinking of the others needs, not participating in mutual foreplay, rushing another’s orgasam, or looking bored, falling asleep, snoring whilst playing.