Adrien's motivation at first was "Sweet! Being a hero is going to be awesome! I get to do what I want for a change, and I can save the world! I can't wait!" he never expected to fall in love.
Plus while he's pushy and should really tone down the flirty kitty act (Which he does after Glacitor 2 but you know why let facts alter my opinion.) His feelings for Ladybug are genuine and he loves her for the adorable, neurotic dork she is.
PV Felix's only motivation was "I want this stupid thing off!" and he was only interested in Ladybug to get a kiss to remove the ring.
Could that be interesting? Maybe about 20 years ago when the concept of an selfish anti hero wasn't done to death.
As for Kuro Neko, well as @iwasbored777 pointed out about 5 people were actually paying attention, so I'm taking their takes on that one with large amounts of sugar.
Too much salt is really bad for you.
Thanks for the ask btw, I love questions that make me think.