Chemistry is a bit broader than just 'having sparks'. There's good chemistry and bad chemistry, and as I've said, it's a matter of opinion. For some reason, you all find Jack and Elizabeth soooooooo hot, and that is the base of your arguments for why Jack and Elizabeth should be together. That's fine; there's nothing wrong with that.
For me, Jack and Elizabeth are disgusting together, and while they have a fun friendship, the idea of them becoming anything more than what they are is absolutely repulsive to me.
It's not even that I hate either character; I just don't like them together. It doesn't feel...it doesn't feel right or real. Watching Elizabeth flirt with Jack was like watching a thirteen year old throw herself on a guy in college.
The kiss that everyone found so hot and provacative really didn't impress me, especially when she chained him up and left him to die. Sorry, a bit of hotness just doesn't negate the fact that what she did was reprehensible.
I know it's just a movie, but eh, I find the logic of having someone kill you be the person you hook up with. That's the best reasoning I can come up with for being squicked by J/E. I'll try to formulate my ideas better tomorrow. 😄