Things I have learned living among the Reenon Kreb

They:

Often cannot relate to humanity, and chalk this up to “cultural differences”.
Have occupations which are recognizably combinations of our own, such as" “politicomedians”.
Appear insectoid and have enormous hulls in their starfaring ships, yet are alarmingly cute.
Get a kick out of trading spices (simply because they watched Dune and Star Wars). They have little practical use for them.
Hated Starship Troopers but are looking forward to Spore.
Put the “mental” in incremental.
Have not separation of church and state, but “states of churches”.
Need to share resources, or else they will spontaneously self-combust.
By far and large, do not invent problems.

Are, by far and large, amoral. At least that’s the closest word I can come up with.
Do not believe in privacy.
Can’t sneeze.
Generate illustrious excitement through sheer apathy.
Convert bored/useless members of their race into food, either for themselves or livestock. (Which means they are cannibals.)
Believe there are no such things as abductions, only interstellar foreign exchange programs.
Never separate “entertainment” from “education”. All fun must be useful.
Would (generally) rather have strong preferences than none at all.
Have conversations which translate into utter grammatical nonsense, but are still perfectly comprehensible to us Earthkin.

(The above is speculative fiction.)