[color=#E8A5A5][font=Tahoma]I use black mostly, and especially when I want to be neat and formal/professional.
But for notes and etc. that are mostly for my personal use, I'll use blue or some other bright color so I can pay attention. [/font][/color]
Black. I like plain writing.
Using other colors aside from blue, red, or black would probably make someone equal to "Jejemon". Like, a "Jejemon" in writing. I don't like looking at the weird colors. XD