The answer to your first question is "correct."
But the only RPG I have played in the past three+ years is D&D 3E. I own CoC D20, and I would really like to play it. I own Spycraft and would really like to play it. I own D20 Modern and would really like to play it. I think I am even going to get a D20 modern side game going soon. But half my group just really wants to play D&D. I certainly don't mind playing D&D, I want to play that as much as any of the other games. So that is what we play.
My hope is that I can get them hooked on the d20 modern campaign and eventually start playing that more than once every 5 sessions. From there, perhaps I can get them to spread out even more. But I am getting way ahead of myself.
Quite simply, I have a good group and a really good D&D game going. As much as I want some variety for myself, I am completely happy to move slowly on the front to maintain the good thing I already have.