I just switched from K Desktop Environment to GNOME Desktop Environment. Currently, I have Ubuntu 12.04.1 64 bit LTS and I am using GNOME 3.5.4. I just woke up from sleeping late so it will take me a bit of time to write a detailed post. GNOME is familiar to me because I used Cinnamon and Ubuntu Unity. Fewer things go wrong in GNOME than KDE 4.9.1 so far. I will post detailed thoughts about GNOME 3.5.4 later.