[johntash]

I'm not currently using a personal wiki, but both MediaWiki and Confluence are pretty easy to set up. Confluence/Jira licenses are cheap for self-hosted personal use. MediaWiki is oss and probably not going anywhere anytime soon.

[klenwell]

I second Mediawiki. I prefer that for professional use:

https://www.mediawiki.org/wiki/MediaWiki

Personally, I've been using WikkaWiki for years:

https://github.com/bakoontz/WikkaWiki

I would prefer something that supports markdown. Neither of these really do.