Genre? I don't see a problem with most of them. I suppose LitRPG would be tough for me to write as I dislike number crunching.
Tropes? Oh, boy! Do I have some of those...
You write a BL/GL story, and magically everyone of the same genre falls in love with MC? Yeah, no, thanks.
Cat/Rabit/Succubus girls? That's just fetish food. I don't recall anything interesting being done with those besides smut.
MC can't string a sentence together when facing a Love Interest? Miss me with that.
A neutron star of an MC (that is to say, a dense MC) who doesn't understand ANY of the hints thrown at him? Yawn.
etc...
Although I have to say, I have written some tropes into my stories which I dislike myself, just because they do fit in nicely.
I don't think there's a genre I haven't touched yet, to be honest, at least if we limit ourselves to the list of genres on Scribble. Though that would depend on what exactly touching a genre means, because for example I've never written an actual BL book, even though I incuded that sort of thing in one of my books.
There are some I'm far less likely to touch anytime soon again, for example sports, or smut, or josei, but it's not like I'm inherently opposed to that.
LitRPG, because I find the numbers to be pointless and annoying. I also have a difficult time enjoying writing it.
Power fantasy, because it's not for me. I don't want a power trip so I have a problem writing characters from a power abusing mentality. It can also be very easy to make the character a Mary Sue without realizing it.