For me, any tobacco produced "off the island" has a definite Metallic taste they can't get rid of. After smoking Cubans for just a few months I had to get rid of 3 humidors full of NC's.
They just tasted like crap and there was nothing I could do about it, even though I really wanted to like them.
I don't even enjoy looking at the NC catalogs anymore...all I can think of when I look at them is "yea, but they all taste like metal"...
A 100% turn around in my case...