Only beer I've ever tried that I dumped out was Hanssens Oude Kriek. Ye gods, man. Awful stuff, at least according to my memory. I tried Orval and I remember being a bit underwhelmed, but I was trying a lot of beers back then and I probably didn't really focus on it enough. One of my favorite trappist brews is actually one of the underdogs, koningshoeven. I remember their tripel had a winey, borderline grapey vinuous note that I loved. But its probably been five years since I've tasted it!