Well Played basically is "you're an idiot" if used in the right context.
Same for Greetings being "hurry up"
anyway, I don't like the excessive emotes, but I still use them a lot
I usually don't initiate Greetings, but I will always respond to one
I always say Oops when my Imp-losion whiffs or something like that
likewise, I will give my opponent a Sorry when they do the same
sometimes I'll say Thanks when they get ridiculously lucky with a stuff, or when they are able to have a perfect counter for a big minion I just played
one thing I find hilarious is when I have a Sacred Trial out and they play Dr. Boom when they have another minion (Dr. Boom dies)
I always give them a Thanks or a Sorry for that
