Personally it would be a Military of some sort. Good combination of size, light-weight, robust edge near pivot, delicate tip for detail work, great ergonomics gloved and ungloved and a good choice of steels with a very adequate, decently strong lock that will wear slowly. A cool looking albeit more delicate alternative would be the Chokwe.
Possibilities:
Gayle Bradley - Great M4 steel, heavy-duty liner lock and designed to NOT fold accidentally. Could be a bit heavy, not much of an index choil, harder to open/close due to safety-minded design.
Caly 3/3.5/Stretch - options between low-maintenance utility and higher-end ZDP versions. Very lightweight and decent ergos and potentially the most comfortable and discreet in-hand pocket clip design. Backlocks generally a little slower, pivot tends to show scratches on the Caly's, clip not as strong as standard designs on Caly's.
Para-military 1/2 - smaller version of Military (great ergos, lightweight, blade design) with a lesser blade-handle ratio for greater overall control. Stronger lock generally speaking. PM2 may have pivot bushing issues and may be sticky for a good long while. Also great selection of steels and handle materials.
Delica/Endura - great bang-for-buck folders that really are all a person needs, great variety of materials and designs (especially if you include related knives like newer Rescue models, etc).
Gayle Bradley Air/Pingo/Roadie/etc - any number of very light and small knives locking/non-locking that fit the smaller, dressier, or pocket-carry needs. I'd pick a Cricket or Air. Dragonfly for more "traditional" Spydie ergos?
Half the fun is in the choosing and trying. I'd recommend trying second-hand knives for the best variety of current and discontinued models and with minimum depreciation.
Of course, there are a number of awesome, more premium knives that would probably fit your needs like the Techno, Slysz Bowie, Tatanka, Farid K2, etc.
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