I’d really like it if we could add another reaction emoji. This one: 
I find myself wanting to react to a comment to acknowledge it’s accuracy or that the post has exactly made the point I had not been able to articulate. They’re hit the bullseye.
I might not like it, or support it, or applaud it, or want to celebrate its conclusions, so giving it a 
or a 
seem inappropriate.
So how about a ?