I've tried Kopi Luwak. I wouldn't say it was the best coffee I've ever tasted, but it was certainly very good. In terms of smoothness it is without equal, however I actually prefer the Kenyan Mamuto I bought from Terrior. It has an intense, rich, roundly tart flavour, with notes of honey, lemon, black currant, flowers and flowering grass. It's quite delicate with a sweetly bright acidity and a silky mouthfeel. There's also honey and ripe lemon saturate with a long, rich finish.
After looking at some of your previous posts I'm convinced you're the lovechild of Frazier Crane and Patrick Bateman