Something that can really set off how your custom knife looks is adding file work to it. There are many different styles/designs to pick from out there. I do all my file work with small hand files. It takes quite a bit of time to complete these designs since after the file work is done, I hand sand each cut so they are a nice smooth finish.
Here’s a video of me doing some file work on a blade.
Here’s some photos of the file work I’ve done.