The first place that you gain fat as a baby is the last place you really notice change as you diet as an adult.
It makes sense that the leanest parts on your body (pre-diet) would look even leaner during and after the diet.
Face has thin skin, ankles, forearms, biceps
Thick skin is on lower belly, back (all of the back actually since that fat is meant to protect the spine and CNS)
Quads are fairly thick especially the upper quad b/c that fat is meant to protect one of the largest and fastest bleeding veins in your body.
Everybody WISHES that the abs would lose first, but then you'd look like that jackass with the implants.
Underarm fat stays fairly thick too as it is protecting a lot of nerves. Don't believe me? Get a tattoo there... lol
Last place to go generally speaking on a Mesomorph is his lower abdominal and lower back fat. This is an area that really is never very active, hence the "broomstick twists" which can liberate fat cells to be released into the blood system. No, it's not "Spot reduction" but those fat cells do not return to the place they came from... so I suppose in theory it could be considered a *kind* of spot reduction.
Try to keep your least active areas on your body active. It's not EZ. Diet must be in check, spot on. Cardio? All depends.