Choosing starting XI ?

[CM-16]

Hey!
I would like to know, how other managers are choosing their starting XI.
There are ways to pick your starting XI :
* Highest quality players. ( Picking players by stars )
* Best performing players ( by form ).
* Best skill % players. ( Like the players with highest def overall %, attack highest overall % )
* By SA ? ( Players with defensive wall, shadow striker, one-on-one etc )
*** Also watching opponent formation and put counter formation against him, that's obvious...

What could be the most important? I know many would say that form is like the most important. ( How many goals, assists etc )

For me form is the most important

And if I face similar or better opponents I tend to use morale boosters