Poppycock. I don't believe for a second you don't have a genre you read slightly more than others, and that is exactly what usual genre means. By your own summation you read it, but YA still isn't your usual reading fare. That is exactly what gothicangel meant, books that blew you away despite not being something you read or read much of.
I can't help what you believe, but I read more books than most, and I really don't have a usual genre. My TBR stack(s) contain almost three thousand novels, and they're in every conceivable genre. I have another couple of thousand novels on my computer.
I read a LOT of every genre. I just do. I love pretty much every genre out there because it's the way something is written that matters to me, not something silly and meant only for marketing like "genre".
And if you want to go by what I said about YA, fine. My usual genre is every genre that isn't YA.
Had the questions been about writing outside of the genre you write most, I would have had a very different answer, but whether you believe it or not, I don't have a "usual" reading genre, or even two or three. I switch off routinely between mystery, suspense, western, literary, SF, fantasy, horror, MG of all types, category romance, historical, contemporary, techno-thriller, sub-genres of each. I also read all sorts of poetry.
Part of this is by design, and I arrange my current reading bookshelves just this way. I believe the wisest thing a writer can do is read as widely as possible, but there is no genre I don't enjoy, there are only
writers I don't enjoy, and this is true in every genre.