A fancy cup of coffee

I like coffee and drink a few cups a day, but I never really understood all those fancy cups of coffee available at various coffee shops. Simple, strong coffee with milk, or just black, is what I drink. Yesterday afternoon, I was queuing at a branch of a well-known coffee chain, where I usually order a medium-sized filter coffee. Ahead of me, there was a slightly agitated gentleman, probably in his late thirties with a receding hairline and a protruding tummy, who ordered in a voice as if to convince himself and to announce to an audience, if my memory serves me right, a grande decaf with no-sugar vanilla and cream. Or something like that. Really, coffee is coffee, why the need for such excessive specifications?