It's an interesting game but despite the insane amount of content it doesn't really last long. The only quests that are interesting are the Dark Hand (or whatever they're called) and you get so wrapped up keeping track of the insane amount of quests that you completely forget about the main quest.
Because of all that you make your way through the Dark Hand quests with ease, get stupid powerful really quickly, have an easy thing with everything else, and eventually quit before you even get past Kvatch because it just gets boring. I know a small handful of people that bothered getting past Kvatch and a very small amount of those people even bothered getting much further in the storyline than that. I actually don't think I know any (real) person that completed the main storyline. There's just no motivation.
There really is such a thing as too much.
