Is Creative Good the Altarian tech tree thing?
The Drath got it first.
As for other techs, the Yor get their "Creative Insight" which provides a +5% research bonus and a +10% creativity bonus. It is found after "Collective Academy" aka "Research Academies".
Also, is it just me or does creativity strike most often when researching a serial technology (like Lasers)?
Some techs cannot be affected by creativity (like "Technology Victory"), so you could be researching a lot techs not able to finished by creativity.