[kcarr]

Some factors you have to take into account are down and distance, the receivers you are facing, and tendencies of the opponent.

In short distance situations if you are going to blitz you probably need to press. Otherwise you will give up easy first downs.

If they are in passing situations, 3rd and long or second and very long, then pressing can lead to giving up a big play so you want to play either standard depth or backed off.

Also, if the opponent has beaten you often in one area or another you have to adjust. Other things to take into account are the speed of their receivers and how many you are blitzing. If you still have one safety over top and they only have one deep threat receiver then you can use the safety to cover there and be more aggressive pressing. Same can be said of situations where your corners are all faster than those they are guarding. If they can keep up then pressing won't hurt so much.