For me, Cognac has always been proof that blended spirits can be really good. (Making cognac is a true art form.)
However, I never really got into them due to what I perceive as a lack of distinctiveness -- probably unjust. Put three really good cognac/brandies in front of me, and I like them, but they just don't seem to taste much different from eachother.
I'm staying away from French stuff these days anyway, but have tried a few Spanish and Armenian brandies that give the french a good run for their money.
Try any Spanish Solara Gran Reserva Brandy de Jerez, and I think you might like it....