My eldest daughter saw Thor today. I'll try to summarize:
Enjoyed it. Yes, it is funny. For once, Anthony Hopkins didn't overact and the result was good. The guy who played Thor was fine, but the role didn't require as much of a range as some people have suggested. Gagged when realized Natalie Portman was in it, but she was okay. Direction very good. Couldn't help but speculate if Branagh would rather be playing the lead himself. Loki is a sympathetic character (just needs a hug).
Hardly Citizen Kane, but good entertainment.