In the 12-18 months I've lost a lot of weight and become something of a bodybuilder so I've gone from a soft 220 to a hard 180. I have a 159 now (freeride) and I wanted longer before...and still want longer.
Personal preference. I am currently looking in the 161-165 range.
I saw a girl at A-Basin a couple weeks back who couldn't have been 5'2" 115 lb and she was riding a 158...and she rocked.