My Sorc, since she's a force healer and the only companion healers are tech based (smuggler / operative clones basically).
My thoughts exactly. Although some of the other answers had me think a bit. Like the one about stealthy juggs. I thought put a sorc on that jugg and the jugg wouldn't need to stealth.
Jugg would just plow through and when something hit him, the Jugg would just go, "What was that? It tickled."
But the one about the remarks the comp would say, now that's an interesting aspect. The attitudes of the alts also passing through. So if you played dark side, the comp would have a dark side attitude. And if that also worked, I might have to change my answer to the smart alec smuggler.