Do I have to choose one? MARDI GRAS (obviously) but also Crawfest, Po Boy Fest, King Cake Fest, French Quarter Fest, Strawberry Fest, and more.
My favorite New Orleans spots are the Fly, lower Oak Street, Cochon Butcherie, Jackson Square, Tulane's campus, etc etc etc,
I chose Tulane because of it's balance between superior academics and an amazing extracurricular life.
I took a game theory course with professor Mark Johnson which was absolutely amazing. I also took a business analytics course (Excel modeling) with Srinivas Krishnamoorthy which also shaped the way I was able to handle my summer internship.