First of all, Prof. Flint is just about the nicest, most cheerful people you'll ever encounter at Columbia. Class with her is often such silly fun, you'll be amazed by how much you're actually learning. She's a fabulous teacher who clearly loves what she does, and the class is like a cozy little family by the end of the semester.
Speaking of which, this is another great reason to study Finnish: because it's so obscure, the class is always small and everyone there is genuinely interested in learning the language. If you're sick of zombielike freshmen in your full-to-capacity Spanish class, then Finnish might be the place for you.
Now, Finnish is supposedly insanely difficult, but seriously, it's not that bad. Grammatically, it's very complex and unlike anything you're likely to be familiar with, but trust me, with Prof. Flint explaining everything, it will all make sense. And anyway, you get the vaguely exotic, or at least very nerdy, cachet of studying an obscure (and, I might add, cool-sounding) language that was one of Tolkien's inspirations for his Elvish languages. Even the simplest phrases are bound to impress your friends far more than some French or Japanese or Latin ever would.
This class is doubly fabulous if you are a linguistics nerd like me; the structure of Finnish is totally fascinating AND Prof. Flint will gladly chat with you about linguistics or etymology or grammar anytime.