I liked the 3e revamp of the manticore a lot. It made what I'd always considered a slightly silly and fairly boring monster more interesting. It reminds me of how seals could be mistaken for mermaids. Seals look nothing like people, but I can say from personal experience that you can mistake them for a swimmer or surfer from a distance. The same principle applies to the 3e manticore - up close it doesn't look much like a human at all, but from a distance or in a quick glimpse, it may seem to have the face of a man.