to Ubuntu 10.10. I give up. Ubuntu 11.04 (Natty Narwhal) was a disappointment and so was Ubuntu 11.10 (Oneiric Ocelot).
Not that I didn't like the new simpler desktop management tools they offered through Unity - It's just not stable. I cannot afford 2 days every fortnight to figure out how to make it work again. If it's a one time thing - I am proud enough to suck it up and do it. If it happens again and again - I am not sysad enough to handle it. And oh the other issues! It eats up about 40W all the time! My battery life drops to a quarter of what windows gives me. My productivity(in terms of time I spend working and not hobby-ishly trying to defend Ubuntu) drops by half.
I have spent enough time trying to defend Unity to my friends - I can't anymore. It's undefendable. It's so extremely buggy that I would consider popularizing it and making it a default only if I was actually working for, say, Microsoft. Sweet Lord! They removed proxy settings' Ignore-Proxy option! I also couldn't figure out a way to increase workspaces. Want more? Well, if you want to make some changes to how the Unity behaves - install Compiz-Settings-Manager. And when you do it - it will result in gnome being fubar.
Only good thing about it all: I am using Wubi, and I keep all my code - all my files, outside the Ubuntu installation. Best decision I have made in this respect. Now I can simply remove Ubuntu from Windows and move back to Ubuntu 10.10.
Probably I am not good enough for Ubuntu 11.10, say "Aye!" if you aren't as well.