I knew a guy who refused to take a nap. Even if it costed him an afternoon of fighting gravity, trying to stay awake browsing websites and feeling utter guilt for wasting the whole afternoon. To him, napping was morally wrong, period. Something I can understand to a poing, if one guy allows himself to sleep while others are sweating it's bad. But he could nap 20 minutes, and enjoy creativity/productivity for hours and even stay 20 min longer (at the same hourly rate) after to pay back his employer so the numbers check out.