NTR. I just don't like it. Netori can be "alright" if done well, but honestly I find NTR to be mostly boring. Most of the execution is just completely off. And the problem with that also is, that any "good NTR to me" would probably end up as drama instead.
Besides that, there are some I have no real interest in. Yaoi and Yuri for starters. I have nothing against them, but the few stories I read felt like "cheap romances, but we get away with it because special". There might be good ones out there, but I haven't read them and I don't really have the motivation to go looking. Same with sports as main-genre in written form. Visual storytelling is just that much more important.
For the rest: I read most stuff, if it is done either well or entertaining. Weirdly enough, I enjoy reading a lot of stuff I would hate to write. I always have the need to try and make my stories a bit different and "off-the-norm" in some form...