Why would Thor like Jane? I think it was partly because she was just genuinely fascinated in him, as a person. A real honest interest in him even if that interest is partly because he's evidence for her theories about wormholes, not just because he's a jock, if you will. It's like say, the High School QB of the football team. Girls are more interested in him because he's the QB of the football team... rather than him as an actual person. If you get my meaning.
And also because she didn't take **** from him. When he smashed the coffee cup in the cafe she was like "No! You don't do that!". He respected her for not ********ting him, not being sycophantic. I bet as the Prince of Asgard he has enough sycophants and shallow girls who like the idea of Thor, the mighty warrior, the Prince, rather than Thor himself. Maybe that's refreshing for the guy.
Plus, she's hot. That helps. And she has brains.
Yeah, y'know, the thing is, you have to feel that thing, that chemistry, that l-u-v, and when you look back at the person after feeling that, after realising it is a feeling that goes beyond friendship, and weigh up their attributes, you can say, 'Yeah, I can see why I love her/him.'
Because in earlier relationships, that have less intense romantic feelings, when you are lonely, you can attribute qualities to a person that they don't have, because you are so desperate for someone to love, and want them to be that person, but they are not.
So, it is a truly beautiful thing when you eventually meet someone and they really *are* the type of person you have been looking for your entire life, they are so 'too good to be true,' you didn't even know that perfect type for you existed, you just wouldn't believe it if someone told you there was someone like that out there, and then you meet them, and it's like 'bam!', almost too much to contain.
and as for brains and physical attributes, yeah, it is a good thing if you can interact with someone who is v good looking, before you know what they look like, and see if you feel that thing beforehand for their personality only, and I guess they like that too, as there will be so many guys out there who they can't trust, as it maybe only a thing going on downstairs, than of the heart.
But, of course, you need the thing downstairs as well, so you have to have a primal physical attraction to them as well, for it to be a long term thing that could lead to marriage or whatever, rather than just a fling with someone.
and as for being into someone cause you know they are fascinated by you, well, in my experience, I realised I was into the person cause I really, really enjoyed talking to them, and was desperate to get their attention and respect for another go around on the conversation. and then you start to feel more, and find out more about them, and then you realise they like you too, and then you find out they are hot, and you keep finding out more and more about them and bam bam bam, you are just getting more and more bammed until you are totally bammy for the woman.
edit:
and all that other stuff you said, of course, you want and need the person to be interested in the real you, not the fact you have millions in the bank or whatever, and the fact that they would not care if you had millions in the bank, that is just a bonus, all they are truly interested in is the real you, you want everything to be real.