I love the ergonomics of the Scallion (was my first Kershaw too), it fits my hand like a glove, except its like an OJ glove, just a lil too tight. I wish they made a scaled up version of the Scallion. I have a Leek and Shallot, both are kinda thin for how long they are, but the Shallot fits well any way I hold it and slides through a belt loop, so its a keeper.
I think the Shallot is more tactical for piercing and the Leek is more utilitarian and public friendly.
Oh a 3.5+ inch machined G-10 handled Scallion with S30V and slap a ZT logo on it. Done.