Thank you all for your generous recommendations! :)
I LOVE MR. BRAIN!!!! His quirkiness (and yup, love of bananas xD) was what made me fall in love with Jdramas at first. I just finished watching Me Too, Flower recently as well. The male lead's character was adorably cheeky, such a contrast with the female lead. But the female antagonist in that drama gave me headaches.
I've watched a bit of FTLY and Padam Padam, so maybe I should continue them again. Judging by the recommendations, I shall just give Dr. Stranger a try (and hope the plot doesn't disappoint).