The only icons I use occasionally are the thanks, thumbs up and love icons. The others are too vague.
For instance the haha icon, are you laughing at a funny comment or laughing at the poster because they've posted something silly?
Equally with the sad icon, are you sad because the subject matter is sad or because the poster is?
And the confused icon can have two meanings too.
The benefit of icons is to provide clarity but without comment some can be pointless.