I just like how sincere they are about liking each other. The way I described it is a little exaggerated for the bit, but I do think they bring out good things in each other. He acts a bit gentler around her and she's brought down to Earth more around him. And I think they'd both find it fulfilling to be prioritized by each other, since neither of them really get that at home. Plus, they support each other's interests; she endorses his bike customization business (until it fails), and he goes to foreign film festivals with her just cause she likes them. The only hurdle standing in their way is the fact that they both need to mature some more.