First of all, the AI is not very good so none of them can be trusted.
They all do erratic things like offer you the highest treaty they will enter into one turn, then declare war the next. There are some with 'nice' settings in their AI files that do these things less often, though.
From memory:
'Xenophobe' races:
Amon Krie
Sergetti
'Angry' races:
Cryslonite
Fazrah
Jraenar
Krill
Piundon
Xiati
XiChung
'Neutral' races:
Abbidon
Drushocka
Norak
Praetorian
Sallega
Terran
'Friendly' races:
CueCappa
Eee
Phong
Toltayan
UkraTal
That's the best of my recollection but I could have shuffled some of them a step out of their proper place.