What don’t I like? The list is long.
Any kind of monster/pony hybrid (snake, tatzlwurm, spider, goo, etc.)
Inanimate object/pony hybrids (esp. planes for some reason)
Human on [not-human]
all the usual fetishes I find gross or bizarre (vore, inflation, tickle, muscle, gore, any kind of death, fat, crushing, diaper, hypnosis, infidelity, coprophilia, sneeze, macro, micro, hyper, many other minor ones)
hentai dialogue
hurtful things
impossibly large *
nazis
most sfm/gmod (esp. anthro)
merch sexploitation
youtube captions
fluffy pony
IRL politics
I used to filter all that (never downvote), but using a filter makes it harder to do staff duties, so I have gone without for a couple of years now.