I did have my ideal blade built.
It's koto/limba/alc/kiri/alc/limba/koto, 6.2mm thick, 92g, with a elliptical/conical handle (
, modeled after
). The handle has relatively heavy Zebra wood in it, in order to shift balance a bit more towards the handle. I like to play harder rubbers, which tend to be quite heavy enough by themself already.
It's v2 of this "vanity" blade, the previous one (that got damaged, but has been restored) was nearly identical: 6.0mm thick, 89g, one anegre outer, same handle shape with less heavy woods.
As to the "why", trying a lot of blades I noticed that I liked harder (but not stone hard) outers, with koto and anegre blades standing out; and blades with kiri cores always felt better to me. So these I took as givens.. The Viscaria family felt near-perfect to me, and the best of these that I found was the Treiber K. No mass-produced blade had anything as natural (for me) as that particular handle, and I wasn't confident enough to play that power. OSP has the handle shape, but not the construction. So I sought to tone down just a bit by going to an inner layer composite construction. I think it worked out.
I haven't really been tempted by other blades since playing it. Getting older, I may at some point need to step down (again) in power. When that happens, I'll see.