For my original, I had a 4" blade, small enough to be carryable but big enough for most jobs. I went with a 1/8" blade thickness for performance; burgundy micarta scales and mosaic pins make it more sheeple-friendly. I favor dangler sheaths, but I know many people don't.
For hard use, there are a number of changes you can make. Trace is working in D-2 or A-2 or both now, so if you're willing to give up some stain resistance for more toughness for harder use, I'd definitely consider those steels. You can, of course, also consider thicker stock than 1/8", although I personally think the beauty of the design lies in the performance so I like to keep it thin. You can also vary the blade size. I have a 5" version (in talonite, actually!), and a 4" version.
For camping and utility use, my personal preference is solidly for 1/8" stock, 4" blade length, and dangler sheath, although at this point I'd also order Trace's multicarry sheath as well. Burgundy micarta handles and mosaic pins make the knife much less threatening and more kitchen-ish looking, which is a big plus.
Joe