Heh heh, golfinho makes some pretty wacky stuff. I'm glad he's gonna have a tablet now; I can't wait to see what he makes with it! Congrats, golfinho!
Regarding the auras, it seems like they're more representative of users' personality types rather than the types of content they create. There's "Light," "Dark," "Evil," and so on; the names don't sound like they would match up well to "Flash," "Audio," and "Art." After all, a piece of art can have so many different themes and moods. If you we're to change the names of the auras, things might make more sense.
That said, I prefer having the option to choose my aura, and I think being able to do so would satisfy the largest number of users.
By the way, NG needs an orange aura. There's red, yellow/gold, green, blue, purple, and pink, but no orange! :O