Hey, Jack!
Sounds like you're light years ahead of me on the VB longhairs!
I'll defer to your expertise on the Liberos having the best-looking hair, but can confirm that on my hometown team, the Libero seems to have the longest hair, though maybe not the thickest.
We've got tickets to the first two rounds of the NCAA tournament this week and next, so that should be fun.
Cheers!