How much foam is 'just right' for you?

Picked up another (yes, I know) board from Jacob Bullock the other day and took it out for the first time today. When I first had it in my hands, I thought the rails were WAY too beefy and that the board might possibly feel clunky because of it. Dims are 6'4" x 21 1/4" x 2 5/8" with the volume completely pulled out to the rails and a very flat deck. Well, guess what? I was wrong. The board paddles really, really well, picks up waves with ease, and is absolutely BUTTER on carves. After one session in fun reef waves, I think the extra volume actually helped with gliding through the flats and keeping momentum in soft, mushy waves. Did I mention butter? I actually remembered a comment Bullock made about seeing me on my fish the last time we surfed together....that it looked like I might not have enough volume. Guess he was right. To be continued... The board in question: