And some characters are better at some areas and places than others. So, after you've played the game through a couple times, you will beneft from knowing who's most useful where.
For example, T3M4 has a very wonderful slicing skill, but he's lousy at demolitions. If you have an area with mines as well as computers, then a better bet may be Mission, who is pretty good with both, especially if you spend the bucks on getting her good equipment. Another advantage of Mission's is stealth. Juhani, you want to give points in stealth because she is utterly nasty with her lightsaber, and can sneak past turrents and such.
On K2, you have a real challenge with Bao-Dur, as he is probably a better tech than a Jedi (sorry to those who think otherwise). Give him cross-class feats in Treat Injury and Stealth and divvy up the points as evenly as possible. He's not the best in a fight, but he will clean house with anything skill-related. On my rare LSF game, he's not out of the party if it can be helped!
With everyone, especially on K1, you want Treat Injury. On K1, party members can't medpack other party members. So, if you don't know where to put it, put it there. On droids, Repair is the equivilent.