Yup, Skyrim is the big one for me too. I also fiddled with FO4 for a while, but nothing keeps me coming back like Skyrim... or at least, its nexus page. If I had an hour tracker on mod organizer 2, I'm sure I'd overtake my playtime in the actual game by at least 10x.
I also create private mod packs for my friends and I to play numerous games. Minecraft, Lethal Company, R.E.P.O., Risk of Rain 2, and more. Fortunately for those last three, I never really scrap my mod packs and instead build upon them constantly as new mods or updates come out. Which I do perhaps a little too much, because I get poked fun at for it now lol.
One thing I've come to appreciate is how detailed nexus mod pages tend to be compared to most other websites. Half the mods for games like Lethal Company or RoR2 don't even have any pictures or detailed descriptions of what they do. I'll hear about a really neat mod in the Lethal Company modding discord server and then check out its page just to see "adds a couple new items and enemies" and that's the entire page.