I change mine whenever the mood takes me, I like to keep people on their toes, and it often represents my current mood or photos of my own fish. Last one is a close up of my dog's nose that makes me smile because I know the context, but probably just odd to others!I’m on my third avatar in 13 months. I’m easily bored.
@Ichthys I've always wondered whether that's a close up of your cats face?
My current avi is a drawing I found somewhere on Google that I unfortunately cannot find the source to credit - but it's meant to be a character from within Sir Terry Pratchett's Discworld series, Mistress or Granny Weatherwax, depending on who is addressing her. Unofficial but very much the head witch and highly respected for her magical talents, but also no nonsense and does what needs to be done, while never letting anyone know when she's vulnerable.
Wonderful character in many of his books, he's one of my all time favourite authors and I often revisit his books, and my forum name is also taken from a character in his books. Who happens to be a kind but no nonsense woman you wouldn't want to cross in a hurry.
Hmm. Not going to analyse my fictional hero choices right now, but you don't need a degree to understand looking up to strong capable women!
Anyhow, I'm not a saleswoman, and Sir Terry sadly passed (GNU Sir Terry), but anyone who hasn't read a book of his, or tried one, didn't get along with it and didn't try another, I can't recommend his work enough. To anyone.

Mine is of our little waterfall at night. We use the red light when the fire pit is roaring. The rest of the time a soft blue light, or none at all.
Ooohh, I like that! I couldn't see it well enough in the small avi on the computer to see what it was, so clicked through to get a better look at the photo, and it looks nice! I like the heron and (egret?) and the touch with the howling wolf climbing to the top of the peak to howl! Must be a lovely feature to enjoy warm evenings outside, with mood lighting! Gotta love a waterfall. And the croc!

Well… didn’t your momma ever tell you not to ask questions, you didn’t really want to know the answer to???
