[krunchyfrogg]

Well, I prefer Imoen in a power party (she covers what you really need out of a thief, and becomes an awesome mage). Imoen is also a must have (IMHO) if you're really roleplaying.

I prefer Jan if I'm having fun, or want to do some really cool thieving things, like pick pockets, backstab, set traps, and dispel illusions. He still makes a pretty good mage, and his banters are just awesome.

I'd choose Nalia if I wanted to torture myself. She reminds me waaay too much of rich uppity Hollywood types who force their ways on others, but aren't in touch with the real world. He soundset is bad, her attitude is worse, and I prefer (SPOILERS TO FOLLOW) to allow her to get kidnapped, complete the quest, and then tell Nalia she's too much of a pain to keep around.