I really loved Fester's Quest, so hard as a kid but me and my friends loved it to the end. The music rocked and the 3D was cool too, I finally finished it in the end and still love the game.
Second favorite would be the Addams Family for NES, never finished it but got so close. I loved the exploration it offered.
I didn't like the rest I played (Pugsley's scavenger hunt) and haven't played Values.