2 days old WD BLUE 1 gb hard drive reached 215 load unload cycle counts ?

It could be the power-saving configuration that makes it act like this. Your computer may be configured to "sleep" and also shuts down the hard drive quickly when you are away from your PC. You may go to Control Panel -> Hardware and Sound -> Power Options to adjust one of the Preferred plans your PC is using. I'd particular prevent the hard drive to hibernate or sleep or turn off too quickly by giving it a large number.
 
20 minutes is too short in my experience. The hard drive will be quite busy just to turn itself on or off. I usually set it at 0, meaning never turning off, for my main workstation that accesses hard drive quick frequently. Frequent load and unload of the reading head of a hard drive would cause the drive to age prematurely.
 


Whatever that means... you reckon HDD will wear off faster being off for 90% of the time but with quite frequent turn on and offs instead of working all the time? Without any proper tests its a blind shot. Motors and servos do wear also just while spinning so with the same logic i could assume it will die due to motor fault earlier.

If this HDD is a main drive then windows will hardly give it time to spin down, it uses idle time to run pref-fetching for example.
If its a secondary drive then it will be off over 90% of the time due to power-saving.

Op should say a bit more about the HDD in the first place. Is it primary or secondary drive?
 
Thats what i thought. Can i bet that that specific Caviar is actually secondary drive from all those 3 meaning you hold the games on it? If so then the answer is quite simple... you load up games and for quite some time the hdd can be inactive. There is no background story from the OS as its not the system drive thus it's actually possible for this drive to be turned off completely in 20 mins or even internally by power-saving futures.
On that link that I've send previously there is another link for wdiddle.
Here is even more about this:
http://www.storagereview.com/how_to_stop_excessive_load_cycles_on_the_western_digital_2tb_caviar_green_wd20ears_with_wdidle3

Read this topic carefully, this will help you to get the relation of load count numbers and the hdd lifespan.
As said before those numbers of yours aren't that drastic but you can tweak it a bit.
The windows power-saving futures are not really related to this matter, those 20 mins set as default means windows will spin off the drive completely if not used, but WD has some internal/firmware futures as well thus wdiddle can settle it once for good.