I've seen lots of posts from people complaining about how they hate how the difficulty of the enemies/quests increases as your character levels up. Particularly when discussing the Kvatch main questline - many players have had trouble completing it when they were beyond level 10.
Personally, I love leveling. It means that even trivial quests can be a challenge. One thing that bored me was when I had completed about half of the quests and/or the main quest in MW, all other quests were just too darn easy.
Oblivion takes care of that problem, but many of you disagree with me! Vote and post here!
I loved it also. Well maybe not so much in Kvatch. One mage saves the entire city. It was hard for me, but all the soldiers were either dead, or anyone of importance was unconcious. Even leveled guards would have been welcome also. I like a challange and I like my allies to be challenged also. Not walked allover.