I've had pretty good luck - I guess the blind buy gods have been gentle with me. That said, I do have a few that just aren't my style, or I can't find proper occasions to wear.
Iquitos: too much rose, I thought I would like it, and it is good, but not really my style and don't know when I would wear it
Navegar: the reviews rave about it and say it's chameleonic; on me, it's always the same - cedar chest with spice packet
Navagateur: again, due to reviews, which rave over this one; for me it's a bit too "perfumey," sort of like Eau des Iles, which is just not my style
Xeryus: saw it at TJ Maxx and figured I'd take a shot; like a weaker waterier, less interesting version of Antaeus or Eucris; smells thin and cheap to me
Still, overall, my blind buys have been worth it: Rocabar, Vetyver Oriental, Bois d'Argent, L'Anarchiste, and L'Eau du Caporal have all been solid for me.