As a martial arts teacher for 25 years and a Spydie collector, my humble opinion -
Self-defense is an attitude - A Green Beret with a cricket is much more dangerous than a wimp with a Civilian.
The mark of a master is one who: studies, practices, teaches and then studies, practices and teaches. The Japanese call this "kaizen" or continuous self-improvement.
Self-defense is NOT always defensive - sometimes self-defense must be offensive as well. You cut before being cut.
You made an astute observation in commenting on the shape of the Hawkbill knives such as the Harpy. They are mean looking slicers but you lose a lot in not being able to stab. Slash and run may be good. But, stab and run techniques are important also.
For SD, if you've got got the attitude, you also need the blade with you at all times. I think this means light and easy to open.
The Gunting and Chinook are excellent heavy weight weapons but not good to carry if you are dressed in a suit, short or chinos. For lightweight SD carry, go with a Massad Ayoob, Police G10 or Military G10 or any of the nylon scales.
Right now my EDC is a Police G10 because I prefer the top lock (Military has a liner lock) and I don't like the slippery Almite on the. If the Military had a top lock with David Boye dent or the Ayoob came in G10, I might switch.
Again, you asked a very good question. I vote for the pointed blade over the curved blade for SD = MBC (Master Blade Craft).