I'm not a zealot or anything, I just like Arch because of certain good aspects. Great documentation for everything I could want to do (though it used to be better). Rolling release. Upstream, latest packages. AUR. On that note, I tend to prefer Manjaro unstable nowadays because it works out of the box and still gets me the latest packages.

I don't particularly care for the whole DIY aspect. I spend enough time tinkering with Emacs and other tools that I don't want to waste any time on configuring/tweaking the OS itself. The different Manjaro versions are pretty decent (currently using the Awesome WM one), and I really like the Manjaro CLI installer (manjaro-architect) if I want a bit more control over my installation.