Neopan ACROS 100, Neopan 400, TMAX 400 (2TMY). I'm sure that other films might also make me happy (I used to shoot +X, TriX, a lot of HP5, and not a darned thing wrong with any of 'em), but these three are enough. Actually, I'd be quite happy with just the 2TMY, but the Neopans are so inexpensive through Freestyle (as Legacy Pro), that I can't not shoot them.