Donna - she was a strong, talented character in the early years. Writer, with big political connections married to Sam Culver and way above Ray's league, but then because Ray felt inferior, the writers gradually reduced her more and more into the bland housewife, stuck in that dull little house that Ray built, sat at home just wanting a baby, in a shack that no front door, just patio doors that opened into the lounge.
The Donna of seasons 2-3 would never have settled for that.
I think Donna should have gone into business with Pam after Bobby's death. Didn't she very briefly oversee Ewing Oil, when JR was forced out by Ellie, or am I dreaming that bit? If not, then she should have.
I loved Donna, even in the dream season, but they ruined her after that.