The amount of sexual related Oblivion mods is unreasonable. I mean I outright don't see the point in them either, it's sort of silly and it's also the reason Oblivion got changed from a 15 to an 18+ IIRC. If you want to see fake cat titties go to DeviantArt or something, fuck. Fallout New Vegas had an issue with this kind of shit too, especially with the two most popular body replacer mods, that were pretty much required for the better looking armour mods, which made you completely naked, your dick sweating in the Mohave heat.
Also Oblivion had the best lockpicking, took me a few minutes to work out how it even functioned and once I did it was pretty much perfect, for a game. It's the reason I learnt to pick locks IRL, I was curious as to how accurate Oblivion got it. Fallout 3/NV's lockpicking was alright but I still feel like they really should have stuck with the Oblivion system.
Enchanting kind of pissed me off in Morrowind, I think it was better in Oblivion, but that's mostly because I found Enchanting too hard in Morrowind since I never really leveled it much since I never played any kind of Mage in Morrowind, though I remember pure mages being OP as fuck in Oblivion with custom spells and enchants, 100% Chameleon? Sneaky beaky like.
Also, changing the topic, slightly. I just finished my first mod, it's only a rebalance of someone else's mod for X3 Terran Conflict, so it's nothing particularly impressive, but I'm proud of it.