Well, seeing as how I'll soon be playing a Psychic Warrior in a new Ravenloft campaign, I'll go with the Psychic Warrior.
Paladin is great, too. And unlike 2E, it's no longer suicidal to play a Paladin. The 2 big detriments were that lame Aura of Protection, which really DIDN'T provide all that much protection for the disadvantage it gave you of evil beings within the 10' radius sensing the aura and being able to identify it as coming from you.
Second, Darklords don't automatically sense you, anymore. They get one scry attempt per day and the difficulty is pretty high. Though it gets lower as you go up in level. So a Darklord is much more likely to spot a 10th level Paladin than a 1st level. But even then, they only get general area (on the Svalich Road, on the Luna River, etc). Only with an extraordinary success can they narrow it down, and that's to a 100-foot radius.
So Paladins' are MUCH more interesting to play now in Ravenloft than they were, before. And not nearly as suicidal.