It is an open ended question of personal taste. My better may not be the next guys better but we are both correct.
For the record, I prefer maple boards but that is mainly from an aesthetic view. I have a 51 reissue (SCPB pickup) with rounds and a 50s P Bass (split coil) with flats. Both are one piece maple necks. They sound nothing alike.
Which brings me to my main point: pickups and string choice will by far have a greater impact on your sound than neck, fretboard, or, yes, even body wood.