I'm not sure about Wyll, he has some good scenes, especially when his heroic facade cracks a little; but he's supposed to be a noble, and they gave him a not so posh accent, then again the nobility in BG are basically up-jumped pirates and mercs, or maybe it's something he shifted into during his time on the frontier, it it's supposed to add to his dual persona, cool, otherwise dodgy.
I'm not sure how much of his act is self-conscious or genuine which is a good place to be at the start, but if it's the game that doesn't know then we'll see.