How big a role do ability Modifiers play in your game. I ask, because the White Box range is -1, +1 where it even exists. 3d6 in order isn't a big deal in such an setting. AD&D has a range (mostly) of -4 to +4 and I see where the 4d6 drop the lowest and arrange as you will came into play, as ability modifiers greatly effect what a character can do well (or not.)
Do you prefer the lower spread of ability modifiers, the larger spread or somewhere in between?