Good subject Bob....A couple things: my latest model, Delta, sports a very simple scheme. Yellow base with large red and blue stripes on top of wings/stabs and large blue/yellow checks on bottom. I can see this combo better than most. For me, the busier the scheme the worse the visibility. Although healthwise my eyes have been lucky so far, my eyesight ain't what it used to be also.
Matt - got a couple pics of your Delta you'd post here?