I've watched 9 on the list including both Danganronpas), but nothing even came close to Re:ZERO for me, given that the second half (episode 15 in particular) pulled the show up to being my favourite ever, just beating out Clannad. Other than that, my favourite show that actually started in the Summer was 91 Days, even if that ending did annoy me. Summer wasn't that great for me other than those two shows, though Autumn seems likely to be better based on what I'm watching.