I just find that everything I do in gnome 3 takes more steps...ie more clicks, more resizing, more drilling down, and on top of it all one additional click that does nothing more then get you off that useless page that is your faux desktop. For me and the way I use my computers this is not a step forward, but two steps back.
If gnome 3 was on a smart phone, or a tablet, and I ran one application at a time, it would be pretty, and get the job done. But I run this on a desktop computer with fair horse power, lots of memory, and with a BIG monitor, just so that I can have several things going on at once and see them all without a lot of dragging, drilling down, resizing, and general piddling around every time I sit down. I can do everything I need to with Gnome 3, it is just more work.
Not sure what the gnome folks were thinking. I've heard it said that they were enamored with OS-X, don't know. However at work I have a very nice brand new iMac with Lion on it, and it is much easier to use and has a very different orientation then gnome 3.