This is one good post me thinks...
The girl posing (second pic)...her left arm was so hard to draw and make it appealling! The face is also off place.
The first pic was done for a friend who wanted to make a surprise to her friend. I think it went well, even though i didn't have time to complete the drawing.
P.S. I couldn't resist making a caricature...there are some faces screaming to be caricatured hehe!