I would and do play the biggest MTT's I can satellite into often busting my bankroll. I always try to satellite into tournaments rather than pay the full amount without a fight. Have yet to score $10,000 dollars or more have attempted it like 44 times.
Why? Because going big it takes similar amount of luck,patience,discipline, skill, time, and effort to win a large MTT guaranteed as it does a small guaranteed MTT. Just because the MTT is a series of small buy-in that maybe cheap does not mean it is easier to win.
Now high-roller or Large Field structure is different story.I prefer large field because I need an amount to alter my life or maybe change it if I had scored big in the Million Dollar Sunday or soon the $5 million Venom. Don't grind is the point you just waste huge amount of time and effort making the casino rich.