Since you posted here, I assume you're making one? For me, since I hold the handle when throwing, I like a straight smooth handle. I like a leather handle because it won't break. I don't consider blade shape or "balance", because all it has to do is complete one full turn and shape doesn't seem to matter. I use an old Bowie style that I had, that I changed the handle on. I use it around camp also. I can't see having a special "throwing knife". I also use my belt knife to cut at the muzzle as opposed to carrying an addition "patch knife", but again, that's just a personal choice.