Day 6: Favorite album
I swear, I tried to pick 2 or 3... but failed, the number is stuck at the current 8 albums! OTL
Day 7: Favorite Keii-chan solo
Aaand another boring answer: I love them all. "Love Addiction", "Uri Sarang", ballads, everything!
Well, maybe "Romeo 2015" not so much, but remembering the live perf and the PV with pretty/sexy Leader... I can't exclude even this song :D
(gif source where there's more of them)