At the moment we only have an option to 
or not heart a post.
There’s a Discourse plugin called “Reactions” that allows a broader variety of ways for users to react more like Discord or Telegram.
Overview
Discourse-reactions is a plugin that allows user to add their reactions to the post. This plugin can engage more audiences to the post. Users who may not have previously wanted to Like your content are now able to send more specific signals about how your content makes them feel.
We could possibly add a few more options like:
