Yes you should change your avatar, I'm not one for having my picture on show 24/7 , with all the identity theft these days one can never be to careful but its up to you at the end of the day.
LOL! I didn't know that was actually a pic of Brookfield. Leave it as is. It's distinct from all the other avatars on the forum. Best of all, it's you.
Most times when scanning threads looking for a particular members post, I just look for their avatar. Brook's avi is very easy to pic out.
Go and google computerforums.org and go to pictures. its funny.
Theres some pics from the "Member Photo" thread, the logos, a few avatars including Celegorm's, Davids, RubberChicken, mark thorpe... well, just about every members avatar.. lol