SPOILERS. . .
Let Vicki find out who her parents were. It's always bothered me to know that one loose end was never tied up.
Let Willie marry his Roxanne and have a happy, fulfilled life. He deserves it. He more than paid his dues.
Go back in time and prevent Barnabas from sleeping with Angelique in Martinique. If I had to, I'd sleep with Barnabas myself! It's worth the sactifice, damn it!
Let Jenny Collins die of natural causes and Quentin fall in love with Beth--for real. She should have been his one true love.
Prevent Roger from marrying Laura and Liz from marrying Paul. I realize this negates both Carolyn and David, but hey, if Liz and Rog marry better partners, they might have better kids!
Love, Robin