A Sebenza of some kind, a Tom Mayo TNT of some kind, or a Strider of some kind. With all of the variations of each out there, it is hard for me to decide on just one right now. If I had a gun to my head... Okay, a Mayonized Large Sebenza, because it would combine my love for Sebenzas and TNTs.
Right now the only knives I buy, use, and collect are Doziers, but I am not crazy about his folders (his full tang fixed blades are just amazing, though). I am thinking about collecting one make or model of folder and I am trying to decide between Sebenzas, TNTs, or Striders. I know some would say "all three!" but I just want to focus on one right now. I think I am going to go with Sebbies. I owned a Large Classic Sebenza, and an SMF, and I miss both a lot but the Sebenza keeps me up at night more often. I have handled several TNTs and they are fantastic, but I don't think I like them enough over a Sebenza to justify the price.