Two days ago I woke at 1:23am and 3:33am. I just think it is neat to look up at the clock and see those kinds of numbers.
Today I rose at 3:40 and pulled myself from bed at 4am. It is difficult to get moving but once up and about being active at this time of day is fantastic. It is quiet and productive! I give early rising a high recommendation.
Of course that relies heavily upon actually getting to sleep at a decent hour.