i am tooooooo loose

a few days ago i had a really nice coaching session with one of my students...i dont remember why, but we started to talk about regs and their ranges and i told him that the most agressive players are mostly the ones that win big over time.....and then he mentioned a really good and respected reg ( i will not mention his name as we are friends), who is one of the tighter guys....
and wow that really caught me off guard...this player is one of the best sng players around and he actually is pretty tight. i mean, he can be loose if he has to, but i think, like me he also believes that our stack is not low very often while others think they are too short to fold...
that got me thinking....since i moved to 180s my ranges in 18s pretty much sucked and i could not win really big...so i started to lay in my bed and think about ranges and moves i could make to exploid regs and also think more about stacks and when we actually are short and when not!!!! and i realized some situations where i am 100% sure most regs will shove as they believe they are too short to fold, where we actually can fold..


example:
say we have 9t on the btn with 3k bb 600.....this becomes an autoshove for most players...for me too few days ago btw...but then i just thought, ok i dont think shoving 100% here is best
1. if there is another shorty who will be dead before me, then it becomes more of a fold
2. if the bb and sb are not super active, then its a shove if they have x stack..
3....i found like 10 more reasons to fold or shove or even CALL that i hadnt even thought about before...
and well, what happened was, that i had the best day in 18s since 2 months ago....
tight is right sometimes....the funny thing is, that i ve always told that to other players....that we are not as short as our stack might show us, but then i made the same mistake others do, by letting my direct stack dictate my action...
but in reality it should be my direct stacksize in relation to the stacksizes at the table in relation to the chips in play, that should dictate the action....

a 5tbb stack in a 18 man is not the same in most spots as in a 180...
and treating it the same will cost u money ...a lot of money....

gl guys....