I don't fly often. When I do, they only gauge I can see clearly is the one with the little plane that shows if I'm banking or if I'm level... so that's the only one I use.
Everything else I have to zoom, ultra zoom, grab glasses, then try to decipher what goes with what. What a hassle.
*edit* oh, that's not entirely true. I do use the rest of the gauges... it's just a hassle to use/see them.