Apparently Micro$oft decided that it would install 11 on my laptop whether I wanted it to or not, & I've just spent the last half hour re-enabling all the tweaks that I didn't want to lose.
Jeez louise.
4 biggies:
Where the icons are in the taskbar (NOT the dock!)/get rid of Search box & widget popup thingy
Start menu. Ugh. Trash all the unwanted crap
Compact view on folder view - why all the space??
Trash the Show More Option on the rt-clk menu. It hid all my extended shortcuts!
blergh