I love Carbon Creek. Mestral is a fantastic character and I think we need a "Eugenics Wars" style novel about his life on earth and through history. The acting is excellent, the sets too.. I still crack up at the Moe joke. One of the best of Enterprise.
There are few things I like about CC, but generally speaking, it's around the middle of my least favorite episodes.
Mestral ("I Love Lucy is on tonight") was my favorite. And I'm sure a lot of people will spit out their teeth at the idea, but I think they could have had some fun with the coda by having Mestral arrive on the West Coast and the first person he befriends is Gene Roddenberry.