Watched it just to tick it off the list. Bit silly and hammy I thought at the start, but at the end I was so pleased I watched it. Good story. Very, very funny in parts, especially the theatre part (guest actors) and the scenes with Korg and with Zeus! Well acted and written. Bale is excellent as always with more than a bit of inspiration from Voldemort....and I did enjoy watching Crowe.
If you love Thor, watch it. Can't wait for the next one.