My experiences:
pakistan - great fish very active, never eats dry foods, didn't eat through copper very well but ate great after medication was removed
auriga - agressive towards other BF's but very hardy
racoon - good hardy fish that can hold his own agianst larger tankmates, red sea ones are amazing
heiniochus intermedius - very active, was agressive twards my hifin coralfish so he is now in my sump with my goldenheart trigger, did alright with the other BFs
teardrop - the one I had ate everything, grew fast and became aggressive once the auriga started up. I want to try another one of these down the road. I really like their color pattern.
pearlscale - good fish fairly hardy, eats most foods
saddleback - I had a hard time getting a healty one, finialy did and it is a great fish. May be more sensitive to copper (last one was not but the first 2 were, not sure if it was weakened due to disease or not)
Good luck, IMO QT and treating with medication are required to keep BFs because they do not handle disease very well.
