For sure! Balance is something I sometimes struggle with. In some games I'm playing, I'm insanely profitable. On other tables I get destroyed, because people are exploiting me and I can't stop myself. I recently got humbled for roughly $1000 at the 100NL tables. All in one session (mixture of bad luck, but lots of bad play as well). I'm now forced to move back down to the 10NL speed tables.
It is especially bad when I go on auto-piolet. When you get into that state of mind and your game is unbalanced you can suffer greatly. It pains me much because I strive to be great, but fear I never will be and that all my poker aspirations are for nothing. I enjoy poker, but I hate losing more than I like poker.