There is an experiment on last week's basic brewing podcast, where they did a malt sampler - 3 beers that were just base malt plus either black patent, black prince or midnight wheat. What was interesting was how complex they found the flavour, and commented that they had always put lots of different malts in their stouts / porters and perhaps they didn't need too. Certainly, some of the historic recipes back this up, sometimes they are just base + black + invert sugar. What I'm trying to say is don't necessarily ignore the simple recipes.