I don't have many games to add here as for the most part I tend to the obscure, not the hated when it comes to games but I do have one:
The Elder Scrolls IV:OblivionYep, the bastard of the series in recent years that is neither as simple and easy to learn as Skyrim, nor as complex as Morrowind, and not nearly as bizarre and archaically hilarious as Daggerfall. I certainly don't love it, but being the first Elder Scroll game I played it shouldn't be too surprising that I have some fondness for it. The main quest for the most part never interested me, (although the pure madness that the Mythic Dawn members spout is pretty great) but what I always considered to be the best questlines of Oblivion and really just better then the other attempts at them in the series are two guilds: The Thieves' Guild and the Dark Brotherhood.
Sure, Morrowind had the Morang Tong which definitely wasn't a terrible questline, and Skyrim's Dark Brotherhood was one of the longer questlines in that game and I considered it to be probably one of the better questlines in that game, but neither were as entertaining as toying with the party guests in
Whodunnit? or sneaking into a pirate boat through a crate like some sort of Snake wannabe. Of course it didn't have nearly as much depth or options as a game like Hitman, but it's an side-questline in a RPG, what did you expect? That being said there are quite a few Morang Tongish "Go kill a dude in a house or something or whatever" quests later on so it is far from perfect.
The Thieves' Guild has a much more iffy quality throughout the series. In Morrowind I got stuck on the first quest because the NPC I had to steal from would never move from the item I had to steal, and the Skyrim's Thieves' Guild has an extreme lack of, uhh you know, *stealing* and tends to be a bit more smashkilltake. (the Oblivion questline certainly contains some dungeons too though) Oblivion is the only one I know of that actually has heists and such which do not include the murder of all the extended Genericguardmansclan, of course the Oblivion questline much like the Dark Brotherhood has the problem of being a stealth questline in a game with a not very complex stealth system. That being said it is certainly better than the other attempts, so if you've never gone through it and have Oblivion, try it out!
That being said as enjoyable as those two questlines are, Oblivion has so much to hate too. I don't need to go into detail, but the people who know,
well they know.