Shouldn't memesura be a preferred format for friendlies? It promotes riichi over dama, doesn't punish you as much for pushing, folding is nonexistent, gomite don't ruin the round for everyone else (and punish the "winner" in the end if other players get a better hand), 1v1 are even more fun during oikake riichi in the end, yakuman hands are easier to get, etc. Basically everything people complain about when someone plays seriously during friendlies doesn't exist in memesura.