I like accessing it by folder. On my lan I have a folder for each author and all that author's books in that folder. On Dropbox I just have all the books together in a folder called Ebooks.
I rarely think about books in terms of genre. i guess that's because of my age. I'm 75 and when I was young and browsing bookstores genre was never in evidence. Bookstores didn't use them and neither did readers.
Every book store had 3 sections for books and of course others for magazines, etc. They had a section for Fiction, one for Non-Fiction and a section for Science Fiction. That was before Star Wars, which popularized science fiction and in those days decent people didn't read science fiction. Everybody knew that. Only people like me did. So bookstores kept them in their own section hidden in the back of the store, often behind it's own wall. If they also had porn they kept the science fiction with it. And yes, this is the way all bookstores were in those days. I may be senile but this I know.
Fantasy, was of couse, kept with fiction. So were mysteries. These, really all fiction of all types except science fiction, were listed together by author. Genre was a French word and we spoke English.
Oh yeah, I almost forgot. A few stores, not most, also had a shelf for westerns but it was always readily available, not hidden from decent people. Westerns were good, just not very good.
Some of the books I read fit in some genre. I have no problem with that. I still read an SF book now and then and an occasional western. I've read a couple of romance novels to see what they were like. I do like historical novels if they're historical novels and not romances. But most of my books aren't genre books. Most are just good books.
Genre began as a marketing tool; a way to get you to buy more books. Obviously you, and most everyone, have bought into that and I'm sure the publishers and book sellers love you for that and have taken full advantage. I suspect they have a saying "there's a genre-lover born every minute".
Barry