What do you prefer--Ball-point pen or ink pen and which color---black/blue?

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In my case i am used to writing very fast...hence a ball-point pen suits me better as it helps me writing fast without bloting like an ink pen... I have used ink pens also... I must say they improve once hand writing a lot...but my score goes to ball-point pens..:-) I usually prefer writing with black pen..but during our exams we were specifically asked to write with blue pens... but otherwise on the whole i would go for a black ball-point pen over blue ball-point pen... What about you what do you prefer and why?