I have a 50 SI, 50 SW, 50 JC, 50 BH, 38 IA, 25 JK, 26 Tr, 20 Sm
Of those completed:
Best, SW, very epic, total respect, enjoyable companions
SI>JC
Worst, BH, "go claim this bounty," "go claim that bounty," i.e. no story, but fun companions
Of those in progress:
Best, IA, it's making me change from DS to LS, and hate the empire in the process
JK>Tr due to epicness, although Tr is fun but its a bit too much taking orders
Worst, Sm, which for some reason is omgwtf boring. I mean, cmon, this coulda been so great...
SW was so good I'm doing it again and going predominantly LS, same with SI (going DS this time).