I just flipped my 3ds open (sleep mode) after sleeping. However, both screens stayed dark, but the 3ds had power. (blue light) I had to force reboot it. Is this an problem that occurs more?

If your 3DS crashed once there is no reason to panic and make a thread about it, most likely won't happen again...
Have you ever had any other device crash before? This things aren't perfect you know, there is no reason to start making threads just because it hapened once.
