I'm not from CA, but I have to admit that I'm sceptical of actors becoming politicians (we had Jesse Ventura as our governor). I've heard criticism of him from the left, but I've also heard that he's rather moderate. At this point, moderate anything would be nice ... republican or democrat.
The cool thing, though, is that he is using his strengths and beliefs to make the world better for kids. Childhood obesity is a sad, sad thing.