Located on my way home from everywhere, I started going to College Falafel years ago. It turns out that I share a nationality with the very friendly couple who own it, and thus we always have something to talk about.
Their falafels are decent, though slightly on the bland side- however, what I really like is how incredibly fresh they are, as the balls are fried (ha-ha) on an order-by-order basis. I have had my share of those that are to get dry and stale, sitting out all day, so this is a welcome difference.
I am a big fan of their chicken shawarma, which is really juicy and extra tasty both in its own seasoning and garlic sauce- making up for the lesser-so falafel, in my opinion. Their spinach pies are good enough, but I have been spoiled by spending so much time in Greektown lately.