i have some questions

that i desperately need some answers to in getting ready for the BAM league. Can you guys help me out

?
1 - TRUTHFULLY, How many of you guys stick with and run the exact play you had in mind when setting up?(regardless of the D - pivoting yes, but still staying with the run play called or staying with the pass play called)
2 - How many of you guys have a play in mind while setting up, but change the play when you see the defense? and what i am talking about mainly is, you set up to run, but then decide to pass, or vice verse.
3 - How many of you guys just set up a formation WITH NO PARTICULAR play in mind, then call your play after the you see the defense?