I agree with shvrdavid on a number of points he made. I don't buy characters or much of anything.   Anyway, it's how you intend to use your creations and not how realistic they should have to be for someone else's approval, unless that is what you are striving for in the first place.

The character in the picture started out as Sally Birk, but became Siobahn, the naughty elf recently.  She is seen without her elf ears here.  :)