The problem with playing LAG that I see is that every move you make at a pot costs a significant amount of your stack in an MTT. Even a the first level with 10/20 blinds, a raise and a bet on the flop costs quite a lot in terms of % of your stack. At level 2-3 it is even more expensive, so one failed attempt will really hurt you. That is what usually puts me on the defensive. Can you overcome this, or should you just bet and pray a few times in order to accumulate some chips?