If you have no clue what stats are important, then us telling you will not help. Everyone here has different numbers on their hud based on what they are looking at at this moment in time.

What I can tell you is that the big 4 are already on the hud when you get it, and they are the most important. It is what the highest stakes players use as well as the rest of us.

VP$P/PFR%/AF/Total hands. Use these and use Pokerstove and you will be well ahead of the curve already.