I'm an Ubuntu fan.
I think the month after Ubuntu 9.04 comes out I'll download Fedora 11 and test that.
Personally I think Fedora 11 will kick Ubuntu 9.04 off of a lot of desktops out there.
That's my prediction. I rather like Ubuntu, in fact, it's my OS of choice.
However, once Fedora 11 comes out, I think I may find myself an RPM fan.
It hurts to say, but I think Fedora 11 will be MUCH better.
Ubuntu 9.10 is supposed to have a completely new look and further decrease boot times. I think that's the release everyone has been waiting for.