I admire Kenneth Branagh as a director and my inner geek openly welcomes new comic book films, but this didn’t really amount to anything. It fell into a category I have come to call “obligatory films” meaning that certain solo films are needed in order to introduce newer characters in The Avengers. They need a project that isn’t of any significance just to introduce a character before moving on to better things, hence the first Thor and Captain America films are average but their sequels after The Avengers are substantially better. Not completely without merit, but ultimately a guilty pleasure.
Adam Lester. 
I agree, the first Thor was definitely a guilty pleasure. I think I even preferred it to the sequel. This was pretty much a transitional film though.
It was just used to introduce Thor for audiences that were unfamiliar with the character, but it could have been worse
It could of definitely been worse, it could of turned into Iron Man 2!