Smileys

There are a huge collection of unicode faces, symbols, and other icons you can use in chat, signs, and anvils called smileys. You can view the full collection by category using the /smileys command.

Emotion smiley keys

In addition to writing smileys individually, there are also emotion keys which produce a random suitable smiley, so you can quickly insert a face of the select emotion. The keys are written as any other smiley
Emotion
Key
Happy
[h]
Love
[l]
Neutral
[n]
Sad
[s]
Mad
[m]
Flushed
[f]
Shocked
[sh]