1. The fanboys that scream better faster stronger. Right or wrong, they are assholes. "It's build like a tank". STFU. 2. Not lefty friendly. I don't mind the right hand lock, but I do mind not even a mention of a left pocket clip option. ZT does a good job with that, but for the most part frame lock producers and designers could give a shit. 3. New custom designer are up in the frame lock butthole. Seems like every cool new design is a non-lefty friendly Ti cocksucking frame lock with the "how do we sell to the fucking idiot masses" mentality. 4. They are ugly. I know I know IMO, but I don't want a pretty side and an ugly side. "Oh but the frame lock skeleton is sexy". No you are just buying into the hype you fool.
All that said, I do like the ZT0550 so I have no beef with you. And your girlfriend is hot so we clearly have the same tastes. And you have Spydies so there is a part of your brain that is kickass!
Thanks for the thorough reply you strange left handed bastard.