I voted good. Have to say though that it bugs me somewhat that Jesse played the role of a villain at first in Ma Dalton before switching camps. Of course coming to think of them as bounty hunters, they would've been better of as cops. Jesse and Frank were the typical bad cop/good cop characters in a way.
I'd say they added a lot mainly to the fifth season, each character got their chance to shine in their own episode with Jesse and Billy showing up twice.
In all: Ma Dalton, Black Corsage, Second Chance, Black Rhino and Squeeze Play are episodes amongst my favourites. From charity work in Thailand to a crazy adventure in Africa. And in nearly each episode a great fight. What more do you want? Of course there's still the episode many of us didn't like.
The Colton episode itself. Most of doesn't like just because Mac only shows up in the beginning and the end. If it was sold, we probably would talk more different.
Now more about the characters.
About Jesse Colton. I'm glad they gave him a... 'Second Chance' to proof he's not such a bad guy after all. Of course his only mistake was that he did it for the money.
Frank is more of a ladies man and enjoys life more. He's also smarter than Jesse no doubt. Jesse means brawl, Frank is more brains, however Jesse has to come up with all the plans. Of course he said it himself in The Coltons that he's at least four years older and there for wiser. Correct me if I'm wrong but he said so because it's true.
Billy, the youngest, well, he's the one who still needs to learn a lot about working the field. He's impulsive and that might work in his disadvantage. However he seems the one with a sense of humor. However that was just only briefly in Black Rhino when the guy says: 'Hang him!'
Mama Colton. She's someone you don't want to fight with I think. She's disciplined but likes to gossip too much. But I think you can learn a lot from her. Also she has a sense of humor. It's just hilarious to see her running after Ricky in Squeeze Play and screaming: 'Help! Thief!'
Still I liked the way she handled Ricky after he stole the baseball cards. It wasn't a real punishment but a great way to learn something.
Frog: I guess we all agree on him. Mean and ugly.