I didn't believe the end.
I enjoyed the movie. It's a nice fluffy feel good film, worth seeing if only to get a shot of Hank Azaria's ass, still I was hoping that in the end he would end up with no one.
The lead guy and Polly just didn't suit at all and at no point did she seem in love with him. It didn't fit that they should end up together. It would have been better if he'd decided that it wasn't so bad being on his own for a while and exploring life. For me the ending spoilt an already mediocre film.