if it's friends, what about posting stuff you feel comfortable with?

I remember when I had a facebook profile, (years ago now), I never posted any pictures- because of my body issues mainly, but yes.. also embarrassed about my look

out of the many interactions I had on their, only about 2 people asked me.. so where's the picture?

I don't really think pictures matter.

not if you're using it to get in contact with people