Okay, I did this with Livejournal a long time ago, and I guess I need to do it again on this journal.
I have four icons I use right now, and even though I have up to 100 I honestly can't see me using more than maybe 20. I'll update this entry as I need to.
First Icon:

This is my default icon. Yes, that is me back when I was shaving my head and had a gotee. I don't have the beard anymore, and I let my hair grow out, but it's still my default icon. Generally I use this for when I'm just posting to post, not really categorizing anything of note, just kickin' it.
Second Icon:

I'm rather proud of this one. It was an "award" for those "repressive traditionalists who come into a perfectly good forum and tell everyone that they are being stupid by saying that whatever works is what Wicca and Magick is all about!" Basically when we were in a discussion forum and got told we were being repressive traditionalists who were hidebound and just mean, we were awarded this icon. I'm proud that I got it within a day of the award being offered. I do reserve the right to call people on their stupidity, and I do it often.
Third Icon:

This is my default "magick" icon. If I'm posting about, speculating about, talking about magick and the forces inside oneself, this is the icon I use. Mostly it's because this one shows that the power comes from within. This is a character from the anime Bleach, one with a lot of spiritual power in her so that it comes pouring out of her when she turns it on. And having internal reiatsu (spiritual power) fluoresce into the visible specturm like this means that there is a TON of power.
Last Icon:

Dribble, this is everybody, Everybody, this is Dribble. She's a Dragon-Cat. A cross of an oriental dragon and an extinct breed of cat from the north Japanese islands. She exists on the Astral plane, and from what I can determine she's about 6000 years old. Normally she's not gold and red like this one, but silver, white and light (ice) blue. There is more fur on her and the face is much more feline shaped. I first met her when she showed up and was drooling into my eye. Since then, my life has been very interesting. She's my spirit companion, the one I will probably be talking about the most here. I have others, but they try to keep a low profile and I'll let them.
Those are about it. I may put up another couple for use with the Astral Combat group, the Honoring group, and so on, but I'm not sure. Just because you have something doesn't mean you must use it.