I'll second the leather-handled USMC as my favorite. It just FEELS SO GOOD in the hand. Confidence-inspiring. Classic. And handy. What he ^ said.
Feast your eyes.
For my next choice it's a toss-up between my Kukri, because it's the meanest chopper I own, and my Warthog, because it's just ridiculous. Pics as promised:
Ok, who's next?