My .02 cents:
Tanto style, 90 degree solid back, 6 to 8 inch blade length, a good thick blade and tang, guard with a small hole, hollow handle (tube) to hold small stuff 6” long, handle wrapped or braided in paracord, screw on water tight cap, cap to have a flat hammer like top.
Sheath should be strong plastic or leather and hold a small sharpening stone, have belt loops, and a strap to retain the blade.
In short, something like the K-bar but with a hollow handle to store a couple of survival goodies.
Things that you can do without:
- hooks in the blade
- built in compass (unless you dont know how to determine north)
- saw teeth
- ceramic blades
- any narrow or thin points
- holes in the blade
- “blood” grooves
- fancy handles
- any thing that looks Klingon