I'm looking to get a 150mm petty with a wa handle and have no experience with them other than the D handle on a Shun parer. The basic shapes seem to be round/oval, octagon, 'D' and octagonal with a flat or slightly rounded top. The Yoshikane I am looking at is round but am wondering if I'll like it and am thinking about a re-handle. I have medium sized hands and am afraid the round handle might be too clunky.
What shape do you prefer and why?