First off, I love sardonyx. She is best magician.
also, I feel like this was an improvement on We Need to Talk, because while Pearl was again being selfish and using fusion for her own wants, but this time she wasn't being malevolent or spiteful about it, just selfish. Also, she shows genuine regret in the end, this time.
Also I think sardonyx is better than rainbow quartz.
while rainbow quartz is very beautiful, we actually got some personality from Sardonyx that separates her from both Garnet and Pearl. Rainbow quartz on the other hand, I can't mentally separate her from Pearl and Rose. Sardonyx appears as her own person while Rainbow Quartz just seams like a vehicle or tool.
but what did you guys think? What is your favorite fusion?