I think the 2 levels of thinking i use mostly are 1st and 2nd level...

I seldom use 3rd level thinking except the times i am trying to slowplay, or be deceptful to my opponent (due to extreme strength of my hand, i would use 3rd level thinking to help me develope a strategy to convince my opponent i was weak) OR OR when i am running a complete bluff, i would use 3rd level thinking to conivnce him in stronger than i am...

Other than those very seldom circumstances, i think level 1 and 2 are used the most with me... I would say i use 3rd level thinking only around 5-10% of the time