Yea, it also depends on your shoes (how easily they slip into the pedal/strap combo) and how tight you like your straps, but I'm afraid a lot of people tuck them in (the buckle, not the pedal...that's just whack) mostly for the tidy look.

Seeing tucked in straps with buttons puzzles me; can't use them to tighten the straps and can't even un-tuck the straps from the buckle without taking the buttons off.