I don't enjoy any champion

So I really don't feel like playing league atm. It's because I don't have a "main" or favourite champion in general. Every game I wonder who to play and mostly I just go with what my team wants (which results in me having a bad experience in game). I haven't played for that long, only a year (not my main acc) and I actually used to enjoy certain champions. My all time favorite was definetly the old Kata (rip ) I didn't play anyone else when I levelled up my first account. I could carry games and I enjoyed playing her so much. but now, that feeling is gone, even tho she hasn't changed too much. <sigh> I'm talking too much, what I'm trying to ask is: how can I find a new main like this again? I generally enjoy ability based champions with mobility. AP would be nice too, full AD team comps have ruined many games for me ^^" The only champions like that I can think of are which one of them is fun and useful even when behind?