There's this girl who fancies me. I've literally never had a real gf before, but I've had sex a few times. The problem is: this girl who's interested in me is very physically titillating, but I'm not sure our personalities would be a perfect match for the long term, which is all I'm interested in right now, I just want a future wife, I'm not really interested in fucking around or anything.

So should I try something with this girl? My instinct is that we won't be a perfect match so it would be more hastle than its worth, but it got me thinking that I have literally 0 experience with what constitutes 'a good match', and I don't know her particularily well anyway, so maybe if I get to know her more we might turn out to be a good match? And I was sorta thinking what are the actual chances of both people laying eyes on eachother and immediately deciding that this is the right person for them, and the other person happens to be in exact alignment on that? Surely if everyone only gabe a chance to people they are 100% interested in from the get-go, then surely we'd all just go extinct becuase its very unlikely two people would happen to coincide on that.

So I'm basically asking for any anons with experience of this: are your first instincts about these things generally accurate and unlikely to change? Do we even need to be a particularily good match personality wise?
And also: there's actually this other girl I was kind of planning on asking on a date. The other girl is less physically stimulating but I'm more interested in personally. Would this bode badly for a future relationship with the girl whose interested in me if she's sort of my second choice to begin with?