The AXIS lock mechanism on Benchmades is all I ever need. Just a flick of the wrist holding the spring down and its open. I open and close it using one hand just holding the mechanism's lever down and never moving my grip to close it. Just keep my fingers clear of the blade. Its great for me. There's so many models now that have the AXIS lock that there is no reason I can see to debate blade sizes, shapes, or metals used.
BTW, off topic a bit:: Boker Plus Reality-Based Blade Tactical Folder by Jim Wagner. Does anyone own one yet or want to own one, purely looking at it for a defensive weapon only? Would his training video and blade be good for a woman? I'm clueless on it.
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Me, a vegetarian? My set of teeth came with canines.