[[Phil Jones]]'s ThoughtStorms. Phil has been doing it for a long time. It has an old school look and I really like that. In terms of content, it's precisely what I want to read in someone else's wiki - a hot mix of quick thoughts and long-evolved ideas to stumble through. It's got wiki [[personality]].
Bill Seitz. Bill's is chock full of history and content too. It has a [[bliki]] feel (in fact, Bill calls it a WikiLog) - it has a [[stream]] of recent changes right on the landing page as an entry point to the rest of what's there.
Ton's wiki. Ton's has a very strong link to his blog (the wiki is embedded in it and mainly an index of posts from the blog). I like to see [[blogs and wikis]] intertwingled. You could argue that Ton's whole site is a wiki or digital garden of sorts - most 'blog' posts will link to previous thoughts on the topic.
h0p3's wiki. I have not really delved deeply into h0p3's wiki, but there are a friend of Kicks. Their wiki is some between '[[wiki as personality]]' and wiki as performance art.
Emsenn's Digital Garden. Their site has gone through a few incarnations, and the latest is a digital garden created and published via org-roam. Lots of interesting stories to be found when taking a [[drift]] through their rhizomatous writing.
[[Nadia Eghbal]] . 'Learning in public' - I like that sentiment. Not really a wiki (perhaps I should remove from here…). I also like how Nadia's writing combines cultural references with other ideas. I definitely want to make those same kind of links in my wiki / blog.
[[Nick Sellen]]'s ponderings. I like Nick's ponderings as an example of someone thinking out loud to themselves, in a way of interest to others.
Chris Aldrich's wiki. Chris has just started up a TiddlyWiki, and you can be certain he'll do something interesting with it.
Anne-Laure's Mental Nodes. Nice, clean design, and the backlinks and transclusion work really well for browsing around. Plus I love the content.