The only champ I ever play is Mordekaiser on normal, no ranked (not even lvl 30, but even if I were 30 I wouldn't play ranked)
inb4 easymode
When I'm playing a highly team dependant game like LoL, I don't want to take too many risks. I only play it once a month, and when I'm REALLY bored. For that one time, I wanna have some fun and roflstomp some random people, even if it means playing with an overpowered champion.
Apparently it works since my win rate is somewhere around 80%.