I was also enjoying the main quest a lot, until the house persuading part... I just couldn't finish it, it's like the game lost all the originality it had before, now I was just moving from one town to another trying to find the right npc's to talk to, which most of the times were at huge distances from each other, and if I missed a slight clue I would be completely lost and not know who I should talk to next. And finding a single npc that you have no idea where to find in such a huge land is just asking too much. So sadly I ended up getting bored and disappointed by a game that was so much fun and had so much potential.
The thing that's bothering me is that I never see anyone complaining about this part of the game, and I see so many people replaying the whole game, so I'm wondering if I'm the only one that felt this way, or maybe I was doing something wrong? I just couldn't bring myself to keep going, it felt pointless since the game wasn't fun anymore, it just became a chore and I lost interest in even trying the expansions.
I keep hearing how oblivion isn't as good as morrowind, but I guess i'll give it a try, hoping they didn't do the same thing in the main quest this time around.