They need to give him a personality. I didnt observe any at all in the first game.
In everysingle SW movie (Even in Episode III). R2-D2 has a scene in which he is saving a person's life:
Episode I: Fixing that ship that the Queen was on and giving it the power to jump into hyperspace.
Episode II: Saving Padme in the droid factory
Episode III: (I would say but it would be a spoiler)
Episode IV: Saving Luke, Leia, Han and Chewie from that garbage place.
Episode V: I can't remember....
Episode VI: Helping Leia/Han open that door on Endor.
So in every movie he did something memorable. In KOTOR he opened that locked door to the Sith Base, but that isn't really memorable. On the Leviathon instead of other characters being picked to rescue you, it should have been T3-M4 saving you in some way and form.
Same thing should happen in KOTOR. That why his character would relate better to you as he has saved your life many times. Rather then just opening a door to a Sith Base....
in one of my games i used T3 to rescue the crew from the Leviathan, and the first time i played i took T3 into to Sith Base with me on Taris. and i got to tell ya (and i know prolly everyone will disagree with me) but T3 was the BEST character to control. but you have to take control of him, otherwise he's pretty useless. when you fight the Sith Governor on Taris, just take control of T3 and que up the other character's combat moves, and then just sit back and hit the stun ray repeatedly. the governor is usually stun, and then the other two characters just whup on him.
onboard the Leviathan, man, T3 is damn near invincible. just change his outer plating to like, level 2 or 3, activate his energy shield, and then arm yourself with the advanced flame thrower. the baddies literally die with ONE blast. all of em. in fact it was really too easy.
and there are countless other times on other worlds where T3 was the last one in my party standing and bailed me out. unless of course you're fighting dark jedi