I'm on week number two with my new, short haircut and I love it. Some reasons why it is so great:
-no more blanket on my shoulders in the summer heat,
-I have achieved the 5-minute shower,
-use less shampoo (lots less),
-my hair no longer falls down in front of my face (I used to hate that),
-it better suits my mood**: when I'm struggling with a particular section, I can work my hair up straight on end.
-it can stick straight out when I don't want it to,
-more frequent cuts which means this haircut will hold out as long as my budget does.
*This is my take on KFR's list suggestion (from a while back).
**My dad approvingly commented that this cut is a little more "energetic" than the previous version. (That's the effect I had in mind.)