As long as the MC's characterization doesn't fall into stereotypes and they're given a rich, varied portrayal,
I'll love them no matter what type they are!
Here are some thoughts and fantasies I have:
Bottom MC:
A realist who calmly observes and assesses everything around him.
Incredibly good at handling people and navigating social situations,
and especially skilled at negotiating deals.
Someone with a strong thirst for knowledge and a constant drive to get to the bottom of things.
If he falls for someone, he'll carefully observe everything about them,
then pursue them, knowing exactly how to make their heart flutter.
Top MC:
Someone who uses clever strategies to get a whole bunch of LIs,
who are either physically big and imposing or have an aloof and haughty personality,
to willingly reveal the side of themselves that longs to be understood.
He lets the other person be the one to approach him,
then slowly creates this venomous vibe that wraps around them,
until they eventually fall into the sweet spider web he's carefully laid out....
(And it really needs to be built up gradually through a long period of interaction for it to feel convincing.)