Has Gnome crashed on you yet? I installed Ubuntu Gnome 16.04.2 LTS, updated everything, switched to the proprietary Nvidia driver, and all runs fine for many hours. But then Gnome freezes, even though I can still move the mouse around and watch the HDD light occasionally flash as though the computer is still running fine. I have to hold the power button to switch it off, although I could possibly SSH in and shut it down that way; I had the exact same problem the first time I tried it many years ago on a completely different PC. It's really annoying because I absolutely love the Gnome 3 DE.