Like anything else it takes time. 15 cigars is what many of us smoke in a week, myself included. Think of it like trying to taste the nuances of any thing, coffee just tastes like coffee until after a while you start to notice differences in richness, bitterness and other subtle differences. Beer, scotch, hot food are some other examples.
I dont do a lot of retrohaling with non-Cuban cigars, singeing nose hair is not pleasant, maybe once or twice for a cigar sometimes none.
The flavor wheel is a good place to start trying to find the flavors.
http://www.cigarasylum.com/vb/showth...t=flavor+wheel