Yes, I've been using Ubuntu exclusively on the desktop for about 6 years now. I recently bought a new laptop (from LinuxCertified.com) and tried out 11.10 (Unity) for the first time. At first I liked it pretty well, but a few days later realized that I really missed the GNOME task bar, where I could see everything running at a glance, and click to open an active window, and click again to minimize it.
That feels indispensable to my work flow, so I'm logging in with GNOME Classic now instead of Unity. Although I commend Mark Shuttleworth and his crew on their achievements with Unity, I just gotta have that task bar. Right now the laptop feels like a dream machine -- the keyboard is perfect and I'm a master with the touchpad.
Also, the desktop behaves so beautifully that it makes my wife slightly jealous, so when her Windows computer gives up the ghost I think she's gonna want the Linux desktop.