Umm, about the ears.
The shape of them is good, but as said before, lacks detail.
This is on paint, so it kind of sucks, but if you don't like ears, you can add just these 3 lines, and you're good to go!
It's just basic, but I hope that"s enough detail for you...
But I love the rest! You have a unique style, and I love the hair and the smile!
;D