My servers will be on 10.04 until the next LTS comes out unless there's something very special coming up. My desktop and laptop I tend to keep up-to-date. I tried out Natty on a spare partition and my touchscreen driver didn't work - I'll let them work out the kinks for a few weeks. I'm decidedly "meh" about the Unity interface. I can probably get used to it, but it seems to take up so much room on the left... On the plus side, my wireless interface just worked - I used to need an external driver. It's my desktop so I'm wired, but it's a good thing for those who aren't.
Still, I may fresh-install Xubuntu Natty on my laptop this weekend if I get bored.