Yesterday, grege posted to a thread a list of Gnome Shell extensions that make the overall environment resemble Gnome 2.x. As someone who no longer uses Gnome Shell I found that pretty interesting not from a "here's how to get a Gnome 2.x feel"-type point of view but from a "here is a list of extensions that you can use as a starting point"-type point of view. Perhaps it would be informative to have an entire thread along these lines.
So I'm curious...if you're currently a Gnome Shell user, what is your specific environment? What particular extensions are you currently using?