Well, personally I like knives in pretty much every length (I know that doesn't help) but here is my queer little view point of the world:
One Knife - EDC
-I like a little fixed blade, 2.5-3.5" for pocket carry. I like something in a thin profile.
One knife - bush
-I like a 4"-5" knife best. If pressed on one knife, I will lean towards 5". It is just very handy and versatile. However, I don't mind a 4" if it has a stoutish blade (e.g. 3/16") and prefer a bit thinner on the 5" blade (1/8") for lightness.
-Looking at your two blades Stomper in this category, I prefer the visuals of the 5". That says nothing of course for how it actually feels - but I like that knife of yours very much.
Two knife combo
-I like a 2.5-3.5" small knife and a 6-7" large knife with the combo minimizing the overlap. On the small knife, I like it to be thin and optimized for cutting. A durable tip is important because the tip work is going to be done with the small knife. I know the last two features are somewhat exclusive of each other, but I definitely do not want a thin cutter with a delicate tip. The larger knife I really like to be on the lighter side (1/8 or 3/16" thickness) for optimized carry and wider 1.5-2" blade width. The greater width imparts stiffness to a thinner stock of metal and also really helps with food prep.
