The fast travel guy for the stilt strider in Balmora has randomly vanished in my game.
Also, currently working on Fighter's Guild stuff, But I just recently was able to access the last couple of quests for the thieves guild.
Its funny, as a kid when I played this I paid basically no attention to the actual quests, main or otherwise, or even the actual way that leveling/skills effected the game. I just ran around, exploring, killing people, stealing stuff, and bizarrely being obsessed with alchemy.
Now for me its ALL about the quests and making sure I'm efficiently leveling and getting the best gear. And to some degree, story.