The semicolon is the shortcut key to emoting in rooms, tells, whispers, and channels.
Emote in a Room
Yourname really loves Threshold!
Emote on Channels
[threshold] Yourname loves Threshold!
Emote in Tells
Secretly, Yourname loves this place!
Suggesting New Emotes
You can suggest new emotes, including guild and race emotes by typing emote suggestion. This will bring you into an editor like bug, idea, typo, or praise and then you can type in detail your emote idea.
Do not use this command to try to simulate a game or system message.