I like metal handles, but doing them well does require a somewhat different approach from most other materials. Not only do they need some kind of texturing, they really need to be shaped to provide a positive grip. Flipper knives that provide a lower-guard when open go a long way toward that. Well-designed grip ergonomics also make a huge difference.
I know I'll get roasted for this, but I never felt that the grip on my large Sebenza was secure enough. On the other hand, I have no concerns about my Aftermath, Dominator, Bump, or Boa, all of which feature lower guards, texturing, and contours that fit the hand. My Leek, which offers only one of the three, is probably adequate, but has never made me confident of my grip.
The great thing about metal handles is that they make it possible to design a very thin, and therefore pocket-friendly, knife. I am also a fan of minimalism and a well-executed framelock is a thing of beauty as well as being very effective.
--Bob Q