I really like Osage. The knife looks very nice. I think you'll find that many people have their preferences and so long as you're making something that you like, that's a great place to begin. Some things that others shared with me that I still try to remember and implement: subtle curves tend to be appealing to the eye. Make each knife as good as you possibly can, which means you're always getting better. Use the knife and hold it in various positions to see if the handle shape could be modified for more comfort, control, or hot spots. On other than chopper type knives (and assuming good heat treat, etc) don't be afraid to take the edge down pretty thin before sharpening.
For hardened steel, carbide drill bits will make it through for pins if hardened is all your equipment will allow you to use. If you'd like to get your hands on some annealed bar stock, let me know and I can send some to you. Sure makes doing the initial grinding and shaping and drilling easier.
Thanks for sharing and great job on the knife.
Jeremy