I was a big fun of ubuntu, and used it on my desktops and laptops, but in last few years Skype became a major tool for me, to communicate with my team, and since there is still no good Skype for Linux, I no longer use ubuntu. On a desktop I use Mac OS, laptop is no longer my central tool, and most of the work from the road I do on my iPad. Thinking to get a book air for long trips, where iPad just can't cut it yet :)

also, unity so far has been a disaster... I know about 5 friends who still use ubuntu, they couldn't use it with unity, and I helped them to get old gnome back. Hopefully unity will gets better, but this change I think was too big and wasn't optional. I think they lost a lot of users because of it.

But I still use ubuntu on some servers of mine.