I really like the Unity interface, and how customizable it is with compiz. I love using workspaces, which are smoother and more stable than the multiple desktops blatantly shoehorned into Windows 10. Virtual terminals are also handy for many of the same reasons, especially considering the fact that I do a lot of work in the command line.
Vim is a bitch to learn, but the more you work with it, the more you
force yourself to
start to love it.Actually getting SSH to work between the Pi and my Laptop felt like a miracle! It was always really clunky to try and do things like that in Windows, and I could never 100% accomplish any projects I set out to do in a Workgroup environment.