I personally enjoy playing Teemo and Graves bot lane. Just honestly feels like a more natural position for them (despite most taking Graves in the jungle and taking Teemo topside).
Then there's the Veigar-Vel'koz botlane that me and my friend love to do rather often, dubbed "the Microwave".
Other times I play Brand as the carry instead of the support.
I like to play things to have fun and theory craft, but what other things do you guys like to take for the fun of it?