Im guessing the truly committed shaver fanboys would find a handmade straight very appealing.
Me Id be interested in a BushCraft size something similar to this...
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Thick ass carbon steel spine with ultra 90 degree edge for use with sparking steel, perhaps some sort of notch or design in the blade guard for shaving magnesium, a coffin shaped handle perhaps in some sort of faux ivory or an antique black walnut I could probably source from an old M1 Garand stock than just linseed oil finish, brass fittings, lash points on the guard, lanyard hole at the hilt, a flat striking pommel, either a leather belt hanger sheath for ease of getting out of the way in vehicles and perhaps a Coyote kydex sheath for use on a gun belt. Figure to size the thing on the smaller end of sheath knife dimensions - not a KaBar at 12 inches but maybe try to stay in the 8-9 inch OAL length range.
But I dont know Id have to think about it.
Dont I have enough knives?