Yes, sorry, I was partly to blame for the 50+ posts on your thread!
If you do a search on "Avatars" there are loads of good ones. Or just wait until you see a picture you like on the web- then sign back into gravatar.com and put a link in to your chosen pic. This will give you a new avatar.
Let us know if you need help linking it to gravatar.com
Go onto gravatar.com
If you want to replace your picture with a new one you can. If you want to remove it go into Manage Gravatars and under your avatar there is an option of 'Don't use this image1. Try clicking that