Why do you play MTT?

Just wondering what the reasoning behind playing these every night besides the cash games or Sit N Gos. Not a spam type question, just an inquisitive one from a guy that plays cash games and Sit N Gos up until now. I played a $1 buyin last Wednesday on Stars and placed 3rd out of 1886, it was my first MTT. I played tight and well and got some luck by winning 3 coinflips.

Now I'm nervous to do another at a larger buyin because of the law of averages. Not only will I be against better players at a 10 or 5 dollar buy in (I would think) but also placing back to back in the money against fields of 1500-2000 is ridiculously tough.

Just curious how much pressure you guys put on yourselves in these MTT and the reasoning behind them.