My favorite quest so far was the Thieves Guild quest Blindsighted, where you had to go into Irkngthand with Karliah and Brynjolf to stop Mercer Frey from making off with the Eyes of the Falmer. Everything about that quest was just epic and made me feel like I was in a movie or something. The dungeon itself was huge and fun, and trying to sneak by the hordes of falmer was exhilarating, and the final confrontation with Mercer was pure awesome (even if he was kind of a pushover by the time I got around to this quest). And I really enjoyed going through it with fellow Nightingales Karliah and Brynjolf, a couple of the more interesting and well-written side characters I think.
So what were your favorites?
