Mukuro and Fran are adorable, hilarious relationship between teacher and student. The best part about Reborn is still the characters interactions and comedy. And all characters are kind hearted (I'm pretty sure that characters in Millefiore will end up being good, just like Mukuro and Varia), it's hard to dislike any characters. The current arc is a bit bleh...but I'll live with it.
Reborn is an exciting read...when you're reading it. Just ignore the fridge logic and you'll be able to enjoy it. I know I shouldn't be saying this on AS, but Amano is a genius in terms of being able to make almost every single frame and lines so slashable for the fujoshis yet manage to make it look normal to normal people.
I swear this chaper had just made me support another 3 pairings. 