like what? again, i'm not challenging you, i'm genuinely wondering.
In addition, Unity is slow on any system that doesn't have a separate graphics card or the latest generation of integrated graphics. There doesn't appear to be a way to turn off the graphical effects to speed it up. Combine that with the usability regressions, and Unity was a definite no-go for me.
That's not to say that I "hate" Unity or will never use it as my desktop environment. I think Unity has a lot of potential. Unfortunately, like all too much software out there, it was released before it had been fully finished. I look forward to trying Unity again when the next Ubuntu LTS (12.04, I believe) is released. Hopefully it'll be far more usable and "finished" by then.
[And if you're opening a terminal, we can be pretty sure that your hands are heading for the keyboard anyway! :) ]
personally, i don't care for customization at all, so i was wondering if there were other issues besides that.