i had my hair a few inches long forever then i grew it down to my chin for years - one day i just felt like shaving it off, even though i was so attached to my hair. but i went with the impulse, used a #2 and for the last 7 years i havent looked back. a couple times i grew it back a couple of inches and was going to keep it but i always got sick of just dealing with my hair and just buzzed it again.
the only reason not to keep it is if you have a funny shaped noggin.
it's a little cold in the winter, but great in the summer, and free & low maintenance and it looks good.
just try it, it feels great