I go for a grind size similar to white sugar; espresso grind you're going to over extract - more nasty bitterness and lose any nice floral notes. If the coffee is pretty freshly roasted also make sure the water isn't too hot, 85-90 degrees Celsius or so is good. Paper filter will give you a cleaner brew, less/no oil; metal cone has a bit more oil (body) and sediment, cloth I reckon it's in between the two. Depends on what you like and the profile of your beans.