Well, killed it with C&C4. I actually really like RA3.
I seem to be the only one who does but you know what? That's just how I feel about it. It was the only game that was modeled in a way that compelled me to play it online.
I only started playing C&C with Renegade. I didn't know what it was until Renegade. Actually, no I didn't know what C&C was even when I had Renegade because I didn't play my first RTS C&C until a couple years later. Not only that, but I didn't start playing Renegade as soon as it came out. I got it as a Christmas gift almost a year after its release. I spent most of the first year or two of Renegade in either single player or skirmish. Then I learned of RA2 and started to play that a bit. In fact, that was my first online game experience. Then, later that same day, I decided to try Renegade online and I've been hooked ever since.
My point is, I play very few online games and RA3 met my standards for doing so. Games like C&C3, Generals, RA2, TS, etc... not so much.