discussion of my main leak ( playing too aggressive on loose tables )

[Adam22]

ok. i've just recently moved back up to 10/20 from 5/10 on party ( you might recall that i made this leap about 2 months ago but was totally crushed due to an insane downswing/realization that my stealing and defense suck microbob's hog ).

so anyway after 2 good months at 5/10 i decided i needed to try 10/20 again. now, i've been running pretty break even for the last 5000 hands or so but i think that i've basically figured out one of the main reasons i had so much trouble at 10/20 and why i continue to have trouble.

at 5/10 because the players are tighter than on 10/20 ( which is a strange phenomenon but it's pretty consistent i've found ) it's a lot easier for me to steal the blinds or win the pot on the flop by betting stuff like KJs, QTs, KQo, ATo etc from pretty much any position. i do very well at 5/10 betting stuff like this preflop because i'm not likely to get callers and when i do they usually reraise and i'm done with the hand on the flop. at 10/20 i'm much more likely to get a couple of calls from weak players who call me down with low pairs, weird draws, whatever.

so basically what i'm asking is

1) has anyone else experienced this and is it definetly something that might be a major problem?

2) am i correct that it is suicidal to raise stuff like QTs MP when i have a 40 vpip and a 30 vpip left to act after me? i just did this prior to deciding to make this post, looked at their stats and literally grabbed my hair, realizing that there was no way i was playing that hand in that situation profitably.

i'd appreciate any feedback regarding playing in looser games. thanks.