Crichton - ENTP
Aeryn - ISTJ
D'Argo - ESTP
Crais - ISTP
Rygel - INTJ
Chiana - ESFP
Scorpius - ENTJ
Zhaan - INFP
Noranti - ENFP
Sikozu - INTP
Stark - INFJ
Jool - ENFJ
Braca - INTJ
It's hard to tell with TV characters, though. They tend to change, but Farscape does have pretty consistent writers. I think the only character writers really had trouble with was Rygel, so he's the hardest to type. I'm leaving out Pilot, Moya, and Talyn for now. I'll think about them later.