If you want to wear lose fitting dress clothes, then god bless your Talking Heads looking ass.

Just don't be the dude trying to tuck his billowy shirt into reasonably fitted pants. If you look in the mirror and realize that your fashion influences are boat sails and parachutes, slim down that cut. If you've developed a little spare tire as a result of eating your insecurities, it's okay to go with a looser shirt, just make sure you've got a place to stash that excess fabric.