Vim-sensible is the first, and sometimes only, vim plugin I use. It is small, takes care of most of the stuff I had in my personal .vimrc file and works across all of the systems I am on. I used to just load up vim with tons of plugins until I realized I used about 5% total of everything I was loading in.
These days it's vim-sensible,vim-go, syntastic and the base16 themes.