A way to get subtle coffee flavor is to pour the wort through a coffee "hop-back" when racking to primary. Again, not a strong coffee flavor, very subtle and smooth. Pumps up the coffee flavor from the the roasted barley.
Also, grind fresh!
Primary: Elliot's Getting Married APA (w/Amarillo, Columbus, Mosaic)
Bottled: Porter 3-ways (Coconut, Dry-hopped w/Fuggles, plain)
Drinking:Double Deliciousness (Double IPA), SMaSH 2-row and HBC 342, Leftovers #1, Coffee Stout