I started playing CnC games with Red Alert 1 back in the late 90's. I moved on to Tiberium Dawn, then to Sun, then onwards into Renegade and the like. I am a fan of the RA1 -> TD -> TS -> TW continuity. I barely consider Renegade as cannon, and I don't care much for RA2 or 3, as they're spin-offs. I think TW could have been handled much better, and as of this point in time I do not like how CnC4 is looking at all.
While I like both sides equally in lore I have a sure fire slant towards playing GDI. I like using Nod quotes because they're catchy :p