If you wanted a fun, maneuverable board, (that did not require all of your weight over the back foot to make a turn), which dimension is most important?

Let's say you start with an idea of volume, based on your weight and balance, you need to choose the other dimensions to suit (and let's stick with traditional "pumpkin-seed" shape boards - not vanguard).

Obviously the combination of width, length and thickness (and variations in shapes) defines the volume. But if you wanted a maneuverable board, would you go with a shorter board, or a narrower board, or a thinner board?

For example, the new Sunova Flow is quite thin at 4 1/8" but it is 8'10" x 31 1/8" and 120 litres - so still a bit long and wide for a 120 l board IMO. Of course there are shorter and narrower boards, but for the same volume they become thicker - which potentially makes them corkier with thicker rails.

So which dimension is most important?