...I wish I could make my fat die. I'm actually experiencing the same issue right now. I have been on the pump for about 2 1/2 - 3 years and until recently had been using my stomach/"love handle" area as my infusion sites. These areas now have developed scar tissue under the skin and are hard and often sore. I've been experimenting with other infusion spots...most recently my upper flank area where there's a good amount of muscle/skin (about 5 inches down from the armpit and towards my back), but I've found that those don't like to stay in and actually have a really nasty bruise on the left side from the one I had in this last weekend. I used to rotate between the left and right side above my waist mainly because that part of me had some fat and was relatively hairless.
Along the hair traing of thought...For a woman (typically not fuzzy bodies...like myself) I would think that the above diagram is a pretty good summation as well as suggestion for other infusion sites to try so I'd say go for it if your lifestyle activities allow some of those sites.
Personally, I'm stuck because I can't use my legs (hamstring/quad areas). They are fuzzy and literally all muscle. I've considered trying the infusion site in an asscheek, but I really don't think that would stay in for the duration due to my active lifestyle that leads to sweating and sometimes falling/sliding on said asscheek(s). The middle of my stomach is out of the question as well due to the fuzzy issue. Maybe I should invest in some Nair...
Hope the above helped before I got off on the tangent of site issues for people with body hair.