Dislike them both in equal measures. Always have done, always will do.
Growing up in the late sixties/early seventies I was surrounded by C*ty and U*d "fans" who never went near either of their grounds. And, of course at that time, both clubs were winning titles; League, FA Cup, European CWC, European Cup etc, while we were in the 4th Division.
I'm glad I'm 6,000 miles away, 6 hours in front and will be safely tucked up in bed sound asleep when the whole circus is in full swing.