Parameters to rely on (e.g. M value, BB size etc)
When you're playing any MTT or SNG type game you might rely on the M ratio or the current BB levels to decide what action you will take or to what degree you should loosen the game. There's also the Q ratio which is less useful.
I personally use the M value (which you prob. know takes into account the SB, BB and antes) but having seen quite a few videos where the commentator just takes the BB into account to determine his SPR and therefore his further actions/degree of risk.
Now I wonder what do you tend to use and what are your thoughts about the reliability of the measure?
Personally, by using the M ratio I catch myself urging to be looser and shove more e.g. when in LP when folded to me. But that mostly gets me in trouble.
In contrast, if I just compare my stack to the BB only, it's another indicator but I'm not sure if it accounts fully for what shape I'm in relative to other players' stacks.