Recently, Fender (the electric guitar manufacturer) began offering vintage reissue models with the originally-issued flathead screws, at some point years ago they had switched to Phillips. When doing any kind of modification or repair, I realised after getting one of the vintage models that I preferred flathead for that reason. Phillips is bad on guitars because not only is it easy to strip the head, but you can also end up dinging the top of the guitar when the screwdriver tip dislodges and hits the nice top finish.

This is also why you should only use a hand screwdriver and not a power driven driver bit.