There are gazillions of stats you can report or filter on - and if you try to use them all in one go, you won"t take any benefit.
Personally, my HUD just contains VP$IP, PFR, AF, C-Bet. Occasionally, if I"m single tabling at higher level than I should be playing, I might amend the HUD to include things like preflop 3B and fold to 3B. By clicking the HUD, you drop down a few more focussed stats per player that give you a snapshot insight - useful for spotting things like their steal ratio, or the %age of time they fold to bets/raises on each street.
Thing is, whoever you ask, you"ll get a different answer as to which stats are most useful during play.