I use sribblehub and royalroad for most things, here and then i red some stuff from FanFiction, and when i feel like reading brainrot i go for webnovel...
Tbh, in my opinion. Scribblehub is the best site for webnovels at the moment. Most other sites either lock their chapters behind a paywall, or are so cringe your face might as well be a black hole. There is a slightly less known website known as Re:Library where you can find some good translated webnovels, but the reader interface isin't as good as any other site.
Mostly RR, I also post here obviously and WN but I haven't and I don't think I ever would sign their contract. I'm not delusional enough to think my novel will get an anime adaption or something but just giving up the copyright to my work feels too scummy. Who knows? I might be desperate for some cash and end up signing it but I hope that day never comes. As for wattpad.... that's where novels go to die
Baen ebooks.com - the Free Library. Has a monthly fiction short-story & a monthly nonfiction article. Collected, by year, effectively a magazine. Good stuff! And if you like SF, you can buy a monthly bundle of ebooks that's well worth it, considering the average paperback will run you $7.99. DRM-free as well
Penana, Booksie, and Belletristica.
Featurewise, and communitywise, Scribblehub seems to be the best of the bunch. Good admins, good web development, great features, and we have the open forums. All the other sites are missing one or more of these.
I actually mostly read FF.net and AO3, because that's where I've always gone.
If it's novels I mostly prefer to go through whatever source for the novel (usually translated) is listed on NovelUpdates. I don't think I've read any scribblehub stories yet, despite writing 30k words of a scribblehub-exclusive story...
I don't read anything on websites like RR, SH, etc. I only read books from an actual store or if it's a Light Novel that's been published in Japan that I can purchase/download.
I bounce around a lot between various sites with just one novel/comic/etc hosted on them and have been trying to get more into SH & AO3 recently. But there's a handful of books I've read and enjoyed on j-novel too!
For original novels, I read many of them from Scribblehub. But l sometimes read original novels on Webnovel (only the ones that do not have their chapters locked behind a payment wall).
For fanfictions, I mostly read them on Fanfiction.net, but I will sometimes read fanfics that are posted on Webnovel or Scribblehub, and I have recently started reading works on Archive Of Our Own.