Hair -
Hair styles are all a phase. Caring too much about your hair could be construed as being vein (that's the male in me speaking).
To hair I say: however you feel at the moment. If you cut it short and don't like it - oh well, so you have to wait for time to grow it back. Plus, time can make you feel differently about it - you may hate short hair at first, but come to like it later. I like it short for one reason - it shortens my "get ready" time in the morning. I don't have to screw around with long hair, drying, styling, etc.