I was very excited about werewolves. I thought it was a great idea to bring them back to the series, but there are a few things that really bother me about Skyrim Werewolves:
-The concept of a temporary transformation, rather than a nightly/full moon transformation, really doesn't float my boat. I love the idea of being able to cruise the entire night as a beast, rather than rushing to find someone to eat. This also makes transforming in the wilderness useless, as there aren't as much people to find. Even if it can help in a fight sometimes.
-Unless I'm exploring the wrong places, there are practically no werewolves to be found in the world. I was really hoping to just run into a werewolf in the wilderness, but I've yet to find any.

-No way to traditionally receive Lycanthropy, like in Daggerfall or Morrowind. Being able to get attacked by a werewolf with a chance of becoming a werewolf sounds....fun, in the scary/intense kind of way.
I love this game, and so these are just minor complaints compared to everything else in Skyrim. I'm sure modders will eventually be able to remedy these, but I still hate to say I'm slightly disappointed.