I’m glad you feel the pull of the Dark Side. Sith mathematics really is where it’s at. 🙂

By the way, the whole “five most important numbers” business is numerology, not mathematics. The deeper meaning of Euler’s identity (in its tau or tau/2 form) only becomes clear through the connection to rotations in the complex plane. Seen this way, the geometric meaning of $e^{itau/2} = -1$ is perfectly clear, as is $e^{itau} = 1$.