Agreed...she is pretty boring...but not as boring as T-Dog.....at least Carol had a storyline....abusive husband....lost a daughter.....has a little thing for Daryl.
It was only after T-Dog died that we actually learned some detail about his life (he was a church going guy....zzzzzzzzzzzzzz).
I don't think Daryl will join "the dark side"...in fact, I think Merle will leave "the dark side" and join his brother...but will die doing so.
Daryl = Luke
Merle = Darth Vader
The Governor = The Emperor