Do you like Borneos best based on appearance or behavior?
Tomorrow I think I'm going to have the opportunity to see all three species in person which I think will help a lot.
Right now I like the Bloods with good red, like the Marter line or even some of the T+ albinos. I think the orange-head Sumatrans are pretty cool looking too as well as the all-black or black & silver ones with red/orange eyes. Borneos look really clean and elegant, I tried looking up some pics of the blue ghosts but they look sort of grayish online, maybe the color just doesn't photograph well.