What do I look like? Hm. Well...
I'm roughly 5'11. I have an unusually arched back and a high instep, although this is not generally visible under the Converses which are my foot attire of choice. I wear a long-sleeved shirt over a T-shirt; I don't like short-sleeved shirts (that is, proper shirts) but I always roll the sleeves up anyway. My head sits roughly in the centre of my shoulders, which are slightly broader than average but not much. My hips are quite wide for a guy, and my rear looks pretty big although that might be because of the arched back... I usually stand slightly slumped over, so my knees are generally a little bent. My arms are rather pale, more so above the elbow. My stomach is held flat by a conscious effort, although were I to release it you'd have a fairly defined arc coming out of my front.
My face is not an unusual shape; I don't have an overly defined jawline, although my chin is slightly square. My hair is light brown but goes blonder in summer, in places to the point that it looks as if I've got highlights, especially at the front. It's currently reasonably short, my fringe coming down to just above my eyes and always swept to one side. My eyes are in the middle of my face, lined up with my average-sized ears quite well. They're (my eyes, not my ears) quite large and usually covered by square half-frame glasses, a strange shade of blue-green with hazel waves and a dark blue line surrounding the sclera; there's almost always a distinct purplish tint beneath them. My nose is straight but curves outwards slightly at the tip, underneath which is a faint trace of stubble. My mouth, under that, is a little large for my face; my chin is more heavily stubbled than my upper lip or cheeks - the latter of which are not overly well-defined. I've not got amazing cheekbones, but my face is somewhere between thin and average regardless.
...
Hope that helps.