Trust list inclusions. If someone includes you - that must count for something, right? Should be weighed though, otherwise newbie sockpuppets would skew the score.
How about the total number of feedbacks? Sent feedback should count for something, especially if the user is on DT. I'm pretty sure a few thousand users recognize Lauda's name because the red tag they've received.
Received feedback is already included the BPIP's "most Trusted" rating, but neutral and negative feedback isn't. And Flags could count too, it doesn't really matter if they're Supported or Opposed. Example:
game-protect is recognized by many users!
Unless PBIP meant to use the second meaning of the word "recognize":
Unique posters in the threads you started and/or total views of the threads your started
I think this is a bad metric. Example:
Report plagiarism (copy/paste) here.: Read 69652 times, 2017 posts (I didn't count unique users).
LoyceV's Trust list viewer: Read 13537 times, 365 posts.
I'd say the latter deserves more recognition than the former, but it isn't reflected in the number of views or posts.