After listening to all the voices, I have to agree with you whole-heartedly. I think I ABSOLUTELY LOVE Yousuke, but felt Yukiko reminded me of the start of Persona 3 when Yukari would speak... it was annoying, but it eventually gained more emotion as she warmed into her role.
Chie...

sucks from the videos.... a pity because I felt that apart from Naoto, she was probably going to be my second favorite character. I hope she gets better, too. ... Her trying to whine over her broken CD was... horrid... Still... it's tolerable, I suppose. It could be MUCH MUCH worse.
Still, I wanna know who Yukiko's VA is, 'cause he's damn good. I'm not worried about the MC. If he's anything like P3's MC at all, I'll hardly remember his voice when the game's done. LOL.