I see the forum game a lot, so I figured, why not?

It's really simple. All you need to do is:

Rate the icon (5-10, since no one would really go below 5)
Say a compliment about it. Don't say anything bad about it!

And if you get a low rate, don't fret, because if you're happy with your current icon and how it looks, then keep it! It's just one person's opinion anyway.

Have fun!