When Unity first became the default DE on Ubuntu, it was unusably slow and buggy on my computer. (This was actually an improvement -- in the previous release, U

When Unity first became the default DE on Ubuntu, it was unusably slow and buggy on my computer. (This was actually an improvement -- in the previous release, Unity would immediately crash, so I had only seen it in pictures and videos.) Gnome 3 Classic was still available as a fallback, but it still wasn't the same (to many changes, to much CPU), so I switched distros. (I didn't know enough at the time to install a DE myself.) At the time, I was quite unhappy at Canonical for making their OS so difficult for me to use. I felt that I was being totally left behind, with a machine that was just old enough that it wasn't worth it to them to support it. 1 or 2 years later, I tried a newer release of Ubuntu on that machine. Unity was definitely more stable than before, but it was still frustratingly slow, and had sprouted the weird, unwanted amazon search feature. I continued to be disappointed that the default install of Ubuntu had become so needlessly graphics-intensive, and haven't played with it since. --- One other gripe with Unity -- I really didn't like how it thought that applications were more important than windows. It was difficult to switch between 2 or more windows of the same applications on the same desktop. The icon on the taskbar just showed a tiny arrow for each window. You had to hover over it before it would show buttons (icons? previews?) of each window that you could select. Alt+Tab was the same. You could only rotate between applications, but if you held it down for a moment, it would show the windows of that applications, and there was some way to pick between those on the keyboard. I really didn't like that. I would often have 2 or more terminals open, or text editors, or file browsers, and I would want to switch to the one that I had least-recently used, and I would have to do this whole dance of pulling up the application, waiting to see the individual windows, and finally picking the one I wanted. The 2-3 seconds that took were very frustrating, since I knew that I had used to be able to hit Alt+Tab a couple of times to go directly to the window I wanted. I have the same frustration every time I have to use an apple computer. It bugged me enough that I read through the keyboard shortcuts settings and learned about Cmd+Tilde, which helps, but is still very frustrating. I want a window! Why does it take two different kinds of keyboard shortcuts to get to the window I want! --- Between those two troubles, I am happy to have avoided using Unity.