As many others have, mine is Aqua Blue as well. The only other option at this point is black, which is a bit too plain for me. Although, the black
does look pretty sleek...
It think it would've been cool if they had included other color options. A lot of people did want red. Myself, I would've prefered a darker blue, or a bluish-purple. Much like my old DS Lite, which was balck on the bottom and blue-purple on the top. I think it would've been better to have a dark blue or purple 3DS color, and a separate green color. The Aque Blue is kinda blue-green to me. I think just a green 3DS would look pretty sweet, too.
My favorite idea for a 3DS is one that is Zelda themed... Much like that leaked Twilight Princess Gamecube controlled we had found a while back. That'd be cool.