Bizarre Alien Psychology: Most of them, to one degree or another, however well concealed it may be by translation and commonly agreed protocols. Particularly notable are the aklaknak and embatil, both of whom are collegiate intelligences rather than single consciousnesses; the codramaju and seb!nt!at, who don’t use identity the same way we do; the cusaron and hjera, which are hive minds of different internal topology; the járaph, who are total solipsists; the mezuar, who are forests; the múrast and voctonari, who have five or so minds each; the tennoa, who are obligate utilitarians; and the vlcefc, who have a sessile brain with coordinating independent non-sophont motiles.

Also, of course, much of the point behind uplift – so you can have minds around the place with fascinatingly different points of view.