I'm always a fan of spontaneity with a purpose, if that makes any sense.
That, and I look forward to writing a straight-forward character for once!
(I-Man started off with a other-dimensional origin and then picked up lots of temporal rigamaroll for what should have been a generic superhero. My small stab at the Vanguard Universe with Prestor John was FAR to convoluted and I gave up a few posts in...)