I've played them all.
RtCW, to this day, was probably the most adrenalin-pumping, fast-paced, team-objective, specialised-class based shooter to date. Combine that with the vehicles from BF2, the eye-candy from CoD/Chrysis/Far Cry2 and yes, why not the 80's, you have a winner.
Yep, I'd happily pay a subscription if it meant frequent updates, solid support and NO HACKERS!
btw, I currently play Combat Arms for its fast paced action