I think the Gurkhas have at least as good a reputation for using knives to deadly effect as any other modern fighting group. I believe this is partially because kukris are daily-use tools in Nepalese culture- and Gurkhas have the right (fighting) spirit.
Kukris have immense chopping potential for their length, and are used with a simple manual of arms. Personally, I believe a deep thrust may well kill an attacker- but probably not instantly. Disarming him will stop the attack, though, and ultimately, stopping the attack is the most important goal, right? Additionally, the only time I would ever defend myself with a large knife is when I was already working with it. Most American Fighters aren't good for much aside from stabbing. I would only have a really large camp knife, which would also meet my ideas about the quickest way to use a knife to stop an attack. The knife should be pointy enough to stab, but optimized for chopping.
Kukris have immense chopping potential for their length, and are used with a simple manual of arms. Personally, I believe a deep thrust may well kill an attacker- but probably not instantly. Disarming him will stop the attack, though, and ultimately, stopping the attack is the most important goal, right? Additionally, the only time I would ever defend myself with a large knife is when I was already working with it. Most American Fighters aren't good for much aside from stabbing. I would only have a really large camp knife, which would also meet my ideas about the quickest way to use a knife to stop an attack. The knife should be pointy enough to stab, but optimized for chopping.