Position changes the information available
An early-position open must survive action from many players. On the button, fewer players remain to act and you will often act later after the flop. This is why a sensible opening range is generally tighter early and wider late.
A blind is a forced investment, not a reason to defend every hand. Compare the extra call cost with the pot and how well the hand can realize its equity out of position.
Use effective stacks
The effective stack is the smaller stack available between two opponents. A 100-big-blind stack facing a 12-big-blind stack cannot win or lose 100 big blinds against that player in one hand.
If you have 60 big blinds and the only caller has 18, plan against 18 effective big blinds. A speculative hand that relies on winning a large future pot has less room to pay off.
Respond to action, not a fixed chart
An unopened pot, an early-position raise, and a raise plus a caller are different situations. Before calling, consider a further raise, players behind, and the flops on which you can continue.
After a session, write down position, stack, open size, and action before and after you. Reviewing those facts is more useful than judging the choice only by the board.