I was initiated into the C&C series with RA1, and I absolutely love Red Alert 2 and the expansion. Sadly, the original C&C series was a disappointment (Renegade, anyone?). Hopefully RA3 will keep with the tradition of campy cutscenes and great gameplay.
What I really want, however, is C&C Generals 2. I keep playing Zero Hour to death, but I still want more.