Whoops I totally went back to dig up some old character profiles to check this out and I'm impressed by my younger self's accidental diversity; to be honest I kind of expected cookie-cutter conventionally attractive characters. Which...they're still pretty close to, but:
Girls: Tend to be in the range of 5'5", presumably because I am so it's kind of my default. The last girl I made, Linnet, is described as kind of awkwardly scrawny, bony, and still growing into herself. Before that, there was a girl who was lithe and wiry, if a little malnourished due to the circumstances of the RP--kind of a lean strength, and then a girl who was pear-shaped, with slim shoulders and soft girlish curves and a bit of clinging baby fat.
Guys: Wider range of heights here. The last three characters were 5'11" and well-muscled/quite strong but also kinda malnourished, so looked pretty lean; 6'1" and broad-shouldered, long-legged, and quite fit; and 5'5" and scrawny-thin, fast on his feet, and good at being very wiggly and flexible in tight situations.
Definitely a tendency towards being fit going on here, although that may be related to the RP scenarios since many of the characters are in roles where physical fitness is very necessary to their daily routines.