Favorite Classes - Samurai (OA), Sohei, Shugenja, Spirit Shaman, Warlock, Warmage, Wu Jen, and Scout. I have always liked the original Samurai from OA; it provided the mechanics necessary for the warrior gentry that the fighter can't simulate - not just for oriental games, but for typical western ones as well. I have always loved the idea of the sohei as the warrior-monk dedicated protectors, though I think they should have other monk or paladin-like abilities instead of minor spellcasting. The shugenja is a great divine elemental spellcaster. The spirit shaman seems very flavorful, but I haven't seen one in play yet and I worry about the apparent lack of thought put into their spell list - If I were to use one I would probably want to get that revised. I played the warlock for a time and found it slightly underpowered, but useful for certain combat situations; I had a blast playing it, though. The warmage seems very focused also, but I think it could be fun to play if you like blasting stuff. The Wu Jen seems like a fairly bland class until you consider his spell list, which has some very cool spells, but I have yet to see one in play. I love the look of the scout and yearn to see one played sometime.
Disliked Classes - Healer, Samurai (CW), Swashbuckler, and Ninja. I can't see anyone wanting to play a magical pacifist on a unicorn that isn't at an age with a prediliction for playing with pretty ponies; YMMV. The new samurai is a blight on the game; the less said the better. The swashbuckler might have been neat if I hadn't previously discovered the unfettered; I have never been able to consider the swashbuckler as anything but an inferior and less interesting version of the unfettered since then. The flavor of this ninja class is... well, the mechanics in and of themselves are okay, but the pairing of them with this archetype is... well... I think I will invoke the lesson I was taught as a child and simply apply it here - If you can't say anything nice, then don't say anything at all.
Undecided Classes - Incarnate, Soulborn, Totemist, Shaman (OA), Psion, Psychic Warrior, Soulknife, Wilder, Marshal, Hexblade, Favored Soul, and Spellthief. Many of these I think I could come to like, but I think I need to see them in play or take more time to digest the material more before making any kind of judgement. That said though, the Favored soul seems rather... blah to me. All the rest have interesting enough flavor, but I remain uncertain about the mechanics involved in the classes execution during gameplay.