For instructions on how to install Gnome Classic on Ubuntu 11.10, click here: http://www.itadmintools.com/2012/02/howto-setup-gnome-classic-on-ubuntu.html
At work however, I have a decent desktop, and Fedora 16 comes up with Gnome 3 in all its putrid glory. In LinuxMint, Gnome Classic is a choice you can make at logon, but in Fedora 16, it's apparently not listed as a choice of desktops. Here are the steps to take to switch your Fedora 16 over to Gnome Classic.
Open a terminal and type he following:
yum install dconf-editor
After the install is complete, launch the dconf editor (located under Applications - System Tools). In the editor, drill down to org, gnome, desktop, session, and change the session-name to gnome-fallback
Now log out and back in. Gnome Classic!
Next, if you want to change your Gnome theme, do the following:
yum install gnome-tweak-tool
After the install, launch Advanced Settings (located under Applications - Accessories). Click on theme, and you will find the settings there. If you want some tips on tweaking Fedora to look really good, check out this article: Good Looking Fedora Tweaks