Hi Grace ~ I'm one of those people (I'm a seller) who usually only clicks on an avatar if it's something, instead of someone. If it doesn't appear to have anything to do with what your shop name is, or maybe sells, I'm not interested. A lot of times, avatars just look like family photos or glamour shots, and that doesn't exactly say 'Professional Online Shop Owner.'
However, I did indeed click on your shop link to see what you sell, and one of these earrings in close up, with your shop name across it, would be very pretty:
http://www.etsy.com/listing/97531958/floral-button-earrings-large-studs-30mmYour avatar is cute, so you should keep it if you like it!