I just started going down this road, too, and it's blowing my mind how nice it is to basically stay in Emacs all day. I took a little bit of scheme once upon a time, so lisp isn't completely new to me, but there's so much I don't know and so much more I could be doing. I didn't go Spacemacs in favor of my own config driven largely by org-mode, but I find myself wanting to go out and actively learn lisp to make it even more my own.