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

#1 Hands - consistently catch the football
#2 Get open - whether it's with speed, precise route running, suddenness / explosiveness, or some other method.
#3 Mental processing / Football IQ - don't matter how fast, explosive, or sudden you are, or how good you can catch. If you're not on the same page as the QB, you're only good on designed plays and broken sand-lot plays.
#4 Strong / Physical - No matter how good you are at the #'s 1 through 3... an NFL receiver is going to have to fight his way off the LOS a lot and win contested catches.