I think I'm probably like you, if not worse. for me a 3.5+ inch blade is a gigantor, and they just won't make it in my pocket. with spyderco blades I started with the tenacious as well, but that's long gone for smaller versions.
if it helps you know where I'm at, size-wise my spydercos that are in the regular rotation are the ambitious, persistence (both with deep carry clip mods), techno, sage, and chaparral. that's where I tend to run, right about a 3 inch blade. small sebenzas, benchmade mini-grips, Kershaw cryos, all about that same 3 inch blade....
I've handled quite a few ZTs, and they are awesome blades. but most are too big for me to carry in the pocket day-to-day (office work). not grip/fit-wise (I'm 6'4" 260), just personal preference for day to day pocketknife size. I like them, but I'd never carry them. If I want a knife bigger than that 3"-3.5" range, it's because I'm in the woods or in the kitchen, and i go fixed blades both those places.
so with that long preface - the ZTs I have for keeps are the 0550 (2nd gen deep carry clip), the 0350, and the 0566. All with custom scales because I'm a prima donna like that. The 0566 is the heaviest in weight, but the smallest overall profile of the three - and that's the ZT that gets put in my pocket the most. not at work but around the house, jeans days, garage/shop, etc. I recently bought one of the new 0770 CF blades also, but I sent it right back. very lightweight, same size as the others, but that hump in the middle of the handle was uncomfortable for me (though others love it). I haven't held any of the others mentioned above that trend more tanto-esque for blade shape, just not my thing, so I'm no help there.
have fun picking, you're going to end up with a bunch of them, just like your spydercos
