So, I've been re-reading David Eddings' Belgariad, which I'd forgotten how much I enjoyed, and I eventually come to wondering about the types of the characters. I'm halfway through Magician's Gambit, and so here are my guesses:
Garion - SULK.
Polgara - I can't decide. At first I thought some sort of FJ - she's rather motherly. But then I realised that she's only really motherly and huggy when someone's scared her half to death - the rest of the time she's fairly intimidating and doesn't mind stepping on people to do what she needs to. And although she's about as important as a woman can be, she's still cooking and looking after the party. She obviously disapproves of her father's rascally ways. But she's very loyal and dedicated. So, my best guess is ESTJ.
Belgarath - Rascally and boyish at times, irritated at formality. Can be sensible, can be irresponsible, can just be uncaring. ENTJ? INTJ? ENTP? NT-something, anyway.
Silk - One of my favourites. Clever, witty, sarcastic, completely adaptable and loves messing with people - ENTP.
Barak - Quiet, doesn't talk much. Lets his actions speak for him. Is wearied with wife Merel's insistance on 'duty'. ISTP.
Durnik - The epitome of the 'sensible Sendarian'. ISTJ.
Ce'Nedra - Obnoxious, attention-seeking and manipulative. :P Willful, but does calculate her actions in advance. ESFJ.
Hettar - Quiet, grim. Holds grudges. Sympathetic and considerate of his horses. INFP.
Mandorallen - Noble, outspoken, insistant on doing the 'right thing'. ESTJ.