I don't like Olaf. His design doesn't seem to translate well in 3D to me, and his personality is just... annoying. Then again, I haven't seen the film yet, so I really should save my breath until after the movie has been released. However, despite my dislike of this character, his design in 2D is flat out adorable. I mean, look at these charming sketches:
They should have just done the freakin' thing traditionally. Alas, we'll have to choke down the final computer animated designs in the theater. I must say that Olaf is a ton of fun to draw with a pencil. The irony.
Olaf is the property of Disney Animation Studios.