How did you decide upon your picture and for what reason?

I thought it would be neat to learn how/why everyone chose their avatars. It would be also beneficial for the newbies to learn how to choose good ones (it took me awhile to figure out how to get a good quality one). I searched about 10 times to see if this question had already been asked but did not find any similar, my apologies if it has (still might be fun for us newbies to read).