I just fell in love with vim ("the editor") after working for a very long time with nano. I love the way it highlights syntax, indents and copies/cuts/pastes visual blocks and stuff. But I don't like that it takes four+ key presses to save and quit a file. That has been the reason for not switching to it for me.
Now I added some key mapping to reflect nano's behaviour. If someone likes it, feel free to use it, too.
Put this in your /etc/vim/vimrc or ~/.vimrc:
" Make vim act like nano map <C-O> <Esc>:w<CR> imap <C-O> <Esc>:w<CR> map <C-X> <Esc>:q<CR> imap <C-X> <Esc>:q<CR> map <C-X><C-X> <Esc>:q!<CR> imap <C-X><C-X> <Esc>:q!<CR> map <C-K> <Esc>dd imap <C-K> <Esc>dd<Esc>i map <C-U> <Esc>p imap <C-U> <Esc>p<Esc>i
Save the file with ^O, leave it with ^X (leave it with ^X^X if you modified the file) and some other nice key mappings (^K for cut, ^U for uncut). Works quite well for me.
Just as a side note: I had to escape the HTML tags to show you this code block. http://www.accessify.com/tools-and-wizards/developer-tools/quick-escape/default.php is a nice choice for this.