That's when I post links to articles like "Why, oh WHY, do those #?@! nutheads use vi?" http://www.viemu.com/a-why-vi-vim.html and "Coming Home to Vim" http://stevelosh.com/blog/2010/09/coming-home-to-vim/, "The vim learning curve is a myth" http://robots.thoughtbot.com/post/13164810557/the-vim-learni..., etc.
Even though I have several different editors on my Mac, including ones I've paid for like BBEdit, I've been pretty much using Vim exclusively for nearly 8-10 months and it's been great.
I started to get interested in Vim last year because of all of the blog posts from folks looking to switch from Textmate for a variety of reasons. And since Textmate was THE editor on the Mac for quite some time, I was curious why accomplished developers were moving away from it.
Of the many things I like about Vim, the one that sticks out for me: there's no ceiling on what it can do and what you can do with it compared to other editors. There's an internal consistency about it that I appreciate--the Vim "language".
Articles like this one "Learn to speak vim – verbs, nouns, and modifiers!" http://yanpritzker.com/2011/12/16/learn-to-speak-vim-verbs-n... really brought the concept home for me.