Actually, a more uniform style for the forum icons would be wonderful. All I've done is cut out a portion of a screenshot, heh.
Would be better to have just the character portrait against a common background. I personally would prefer main story characters as the figure.

For emoticons, something like https://gyazo.com/bc06ca8759cfb835704faa5b396656a3 is about perfect. Preferably using one or more characters from any nutaku games.