Hello, neat topic. Actually, we're exactly the opposite. The guys in my group meticulously plot out their feat progressions, squeezing every advantage they can out of the system. They have built some fearsome characters - all strictly legal. And funny, but among my friends, the concept of not choosing a feat until you need it for campaign purposes is not only foreign, but reviled. It's considered cheesy, and our DMs don't allow it. When you level, you choose your skills and feats. No saving them for the advantageous moment.
My guys are all about the character concept, which involves working magic with numbers and then slapping a roleplay label on it. The way you describe what your group does is fascinating, and sounds fun, but my friends would never go for it. We are powergamers at heart.