Some people have said that Wobbly windows do not improve productivity, and that its unnecessary candy for the Linux desktop. I initially thought I would not be able to stand wobbly windows for long.
I was wrong. Wobbly windows are now an integral part of my computing experience.
Non wobbly systems feel arcane to me now. If a window does not become transparent when I drag it, I get the feeling am using a cell phone instead of a computer.
Also, wobbly windows are great when you are waiting for an "svn update" to complete, or Evolution to import email, its great for stress relief.