Physical traits, speed, agility, explosiveness attributes of Top WRs (What's the formula?)

In broadest terms--

Hands: Needs at least two. More would be better, though.
Legs: Also got to have two. In this case, more than that might be problematic.
Feet: See above.
Head: Oh yeah.
Heart: Both literal and figurative, please.
Prehensile tail: I could go either way on this one. While it might slow him down, his balance would be off the charts. Might lead to tripping penalties, though, which would make it a liability. Know what? I've decided. I'm off the tail train.