A lot of people [censored] about their favorite feature that was taken out by morrowind, but here, I want to know what is added that people actually enjoy, for me it would be:

1- The crime system.

In Oblivion, if someone even saw you tresspassing for one second, every guard in the province would immediatly know where you were and hunt you down relentlessly. While the Skyrim system is a lot easier, which is usually a bad thing, it just feels so much more complex than the previous system. I love how, if a robbery goes bad, I can kill the owners and get away with the crime (like in real life.) I also like how bounty hunters would track you down.

2- The perk system

While I do hate that they removed attributes, I do enjoy the perk overhaul. There is just so much more customization than the Oblivion perk system. It helps let me define my character more, and even if I get all skills to 100, I still feel like I am a certain class because I would have put more perks into certain skills than others

3- The wilderness

For one, it was so much more detailed. In Oblivion, I felt like they had long stretches of generic woods, now in Skyrim, the land feels so much more detailed, not only the general terrain, but the towns as well. It felt like they took the solitary roadside inns of the previous games and built an entire small town. It really made Skyrim feel like people were living outside of the major cities. I also enjoyed the orc strongholds. It made orcs have more flavor and really made them feel like outcasts in this world. Also, giants were a really nice feature for almost the same reason. They made Skyrim feel more alive. This was partly because of the fact that they felt like they actually belonged in the world, rather than just being a generic enemy to attack you.

Oh, I also liked the Daedra. The quest feel more unique and it really made the daedra feel more evil than Oblivion daedric quests, most of which were just generic dungeon crawls with some mild twist.

Maybe it's just me, but I liked Oblvion's wilderness better, mainly because of the inns. One that comes to mind is the Inn of Ill Omen. I don't know, it jus felt to me like their was more interaction with the world in Oblivion.

Drunken Dragon Inn was my favorite, a handy base for exploring Black Forest In Skyrim there's only Nigthgate Inn as an inn not in a town or a village.

On topic, alchemy i like better than in Oblivion. Able to use a reagents all properties regardless fo your skill level. Also inclusion of Spell Tomes is another good idea.

Spell tomes was in an Oblivion DLC, but yeah, I do like that feature. It is rewarding to get a nice spell at the end of a long dungeon, even though you can buy it at a mage.