Most common offensive+Defensive play books ppl use?

Im curious to see what most people use for their offensive and defensive playbook and if so why?

Saints O & 46 D

Saints because it has a good mix of all the meta formations and also a good mix of iform run plays. 
 

46 has big nickel  G, over, 335,wide,cub, dollar, 46speed package, 34bear. 

Saints isn’t really that superior several other offensive playbooks have several of the top formations. Pats offensive is really nasty but saints is most popular probably because it’s got the tight offset ,bunch, and trips that are most popular. I don’t use it for that reason. I like coming up with my own schemes. 
 

46 on the other hand is superior unless you run 3-4 or like putting your ends and olbs at DT in 335 odd. 46 has a speed package where your 3rd and 4th CBs line up in the box at LB positions.

I run Saints O and Falcons D