It's an extremely popular idea among the Sailor Moon fandom that the senshi are less than straight. I personally favor this idea, considering they are going to be living a whole lot longer than those around them.
So, the question I pose to you is this: Among the senshi (Moon, Mercury, Mars, Jupiter, Venus, Uranus, Neptune, Saturn, Pluto, Chibiusa) which are your favorite pairings? Which do you think should be paired?
Personally, I love the Mercury/Jupiter pairing. They're extremely different, but their differences compliment each other. Jupiter/Makoto is the so-called "muscle" in the group, while Mercury/Ami is the "brain". Before meeting Usagi, Jupiter's strength alienated her, while it was Mercury's smarts that caused her to be alone.
I also like Usagi/Rei, Saturn/Chibiusa, and Venus/Pluto. I'm not going to even mention Uranus/Neptune, mostly because that's just too obvious. :P