Wikihosting

What wiki hosting site you reccomend?
(i'm planning to migrate from reddit wiki, don't need anything fancy: just page history,categories(or tags) and hyperlinks).

a few new wikis:
http://boardgamedesign.wikidot.com mainly for chess/go variants and
abstract board games(such as Conway's game of life)
http://videogamedesign.wikidot.com for video game ideas(RPG/RTS)
http://easternphilosophy.wikidot.com for philosophy/spiritual pages