title_body: Why would anyone want to hand grind their coffee?
upvoted_answer: Hand grinders will work without electricity.  
  
  You can generally get a conical hand grinder cheaper than you can get an electric one.  
  
  They also create less noise than a electric grinder.
  
  Hand grinders will generally produce less heat than an electric (may affect bean flavor).
  
  Many grinders are lighter and smaller than electric ones. They are portable and can easily be packed for use when traveling.
  
  As to the consistency, a conical grinder (electric or manual) will generally create a more consistent grind than a electric blade "grinder".  Electric blade grinders tend to produce dust and boulders.  I know because I use one at work daily and I can see the inconsistency in the grind, but it doesn't bother me that much.  At home, my burr grinder creates a much more consistent grind.