Here's my view of C&C games:
Tiberian Sun: when I first played this game, I skipped C&C1
Red Alert 2/Yuri Revenge: this is the game where I got into C&C series
Generals/ZH: currently this is my favorite C&C games ever because it's easy to modify despite it's boring singe campaign
Tiberium Wars: Best AI ever but the Storyline is makes no Sense
Tiberium(Tactical FPS Game): why EA Cancel this game despite this game is vastly better Tiberium Wars sequel than C&C4, notably Scrin's second invasion that didn't happen in C&C4
Red Alert 3: despite it's cartoony nature, this game still has everything that C&C4 isn't have
C&C4: I never played this game, but i know there's a new Unit in C&C4 that never appeared in any other C&C installments that works like Edward Cullen on Treads that further makes C&C4 more like Twilight than the rest of C&C franchise as this thing replaces just everything that makes C&C games Command and Conquer in C&C4, and the overpowered nature of this unit makes this unit Mary Sues of Command and Conquer just like Edward Cullen and others in Twilight