I suppose I fit into the "artistic types" category!
Seriously though, I do suggest reducing the opaques for better sprayability as they can get grainy when using lower air pressures. Remember, the lower air pressures make for less overspray and more precise control.
I'm in the artistic boat too. It isn't just fine detail though. I do allot of baits with contrasting colors, like chart. belly / purple back. Without thinning it, the purple edges look grainy and there's distinct overspray. Thin it out a bit and the edges fade beautifully. Autoair metallics, and the opaques mentioned previously, are the paints I found that have to be thinned to get great results.