Paul Mitchener came up with a new writing challenge on role-playing games called “12 RPGs for the 12th Month” (see the full list of questions here.)
Question 7: 13th to 14th December
Is there an RPG genre which you sort of like but gives you severe mental blocks. What do you like about it? What are your mental blocks?
Not really. I can play, run, and write in just about any genre, although I may have to tailor it heavily to my preferences; a good example is making steampunk less colonialist.
I do have the same problems with certain fiction genres or subgenres that I have in other media (books, movies, etc.) For example, I’m not terribly fond of horror, except in a relatively narrow band, and I hate gore-fest horror. I’m also not a big fan of magical realism, it just doesn’t get me engaged.
But I can’t think of an actual mental block, let alone a severe one.
The Reef 
I don’t mind playing horror, but I just can’t seem to run it well. It isn’t my thing – I don’t particularly like most horror fiction, I don’t enjoy most horror movies, and the fact that H.P. Lovecraft was a racist shit interferes with my appreciation of the Cthulhu mythos.