these are always the biggest wins or losses In Position Opponent checks flop check turn bets river

[Fastrockyf]

I have  noticed that when I'm last to act Meaning imposition and player checks flop then calls my bet then checks turn and calls my bet then he opens on river if he opens less then half the pot I usually win a big pot if he bets more then a 3rd pot he usually has a set and I'm losing a big pot I used to think that check call check call ment. Player was on a draw but I have Realized this beting pattern is never a draw I actually think its there way of. Seeing of you are on a draw

The hardest set to Detect is 6s and under  but 2s I somehow usually can detect it I don't know why 

[P0LarAcE]

all depends on opponent, ranges... etc. 

I think you need more info and more in depth hand analysis to explain more of what your saying

[Mindy J. Highsmith]

More analysis is really needed, but your post is suggestive.