I'm not sure about whether Uranus or Jupiter would contribute to more mental chemistry but my boyfriend and I have Composite Uranus in the 3rd.We don't talk everyday but when we do, we pick up where we left off. We come up with crazy ideas together which can be a bit reckless, out of the norm, or frowned upon in society.
We're long distance as well. It wasn't like long distance until he moved but even when we lived in the same town, our communication was sporadic. We keep in touch through the awesome inventions of webcams and phones.
It's fun and keeps the spark alive