Like many other reviewers, I started watching this on to see Mathew Perry return to television. He's always been fun to watch and Mr. Sunshine is no exception.
Unfortunately, the show hasn't hit its stride yet. Four of the cast members are fun to watch and offer some decent laughs: Perry, Andrea Anders, James Lesure and Allison Janney. The two additional cast members however are one note jokes that wear flat almost immediately.
Nate Torrence's "I'm an idiot" shtick gets boring really quickly and elicits no laughter. Portia Doubleday has potential, but the show works the crazy angle so hard that it retreats into sitcom cliché instead of real character.
I'll still be watching the show in hopes it improves, but its going to need some work to stick around.