I would have to disagree here, the purpose for discharging the battery is to allow it to build memory, agreed the nimh are not as prone to this as the nicd were but they still build memory
if you don't discharge a batt completely then you charge it and you do this over and over the batt will soon appear to be dead when it actualy has charge in it, it is the memory that makes this happen. now this won't happen overnight and if you forget from time to time it's no big deal
BUT if you make it a point to only run your batts to the cut off then full charge them they will not last long before your flight times will be reduced, then you create a new shorter memory and so on and so on untill the batt is no good at all. It is a good practice to run your nimh down as low as you can after each flight by running the motor at low rpm till it will barely turn. I take 3 good cycles of discharging the batt to see the improvement, this is the amount of time it takes to build the memory..... this is just my 2 cents worth