What I've learned from a lot of talented artists such as yourself is that a lot of great detail isn't necessarily on purpose. More, once a person really gets into a piece, it seems their brain tells them what it should look like without them even needing to think about it. I have some artist friends who claim they just stop thinking when they're drawing, and instead let their brain take over. Not sure if that's how it feels for you, every one is different, but I've always thought it a cool idea. I wish my artless brain could do that!