My favorite would definitely be the Nishijin R model -- the length of the Manix, PM2, or Stretch, thin carry, nice thumb ramp and choil, and I love the blade shape. I've long wished they'd bring out other versions, like G10 for example. I've picked up a spare, in case the spirit ever moves me to make some other type of scales for it, though I really like the Nishijin -- just like variety as well.
Also like the original D'Allara plain and SE versions for their hand-filling grip and the new D'Allara 3, for it''s very comfortable feel in hand despite very thin carry. And last but least
, the great man Ed Shempp's CF Balance.