I've had a few of them. I tend to like most of the La Gloria Cubanas I've ever had. Didn't care much for the Rocky Patel Freedom. Macanudo and Romeo y Julieta sticks don't agree with me. I've never been disappointed by any of the Fuente line. I've bought about 6 or 7 Black Markets, but never been able to smoke one! Friends keep picking them out to have for themselves when they come over for cigars and cards, so I guess that says something.
Like some of the other guys have said, make sure you try each one and decide for yourself which ones are gems. Cigars are so subjective you'll likely never find anyone who has the exact same list of favorites as you. Heck, depending on the situation I've even found that my personal tried and true cigars let me down depending on the environment in which they're consumed or my mood in that moment. The only time I consider a cigar a waste of time and money is if I come out of it with absolutely no reaction. Even a bad reaction teaches me something about that particular stick and my own tastes.