I'm not an expert, but I've studied astrology for a few years :]
Houses
MC's Sun in BB's 8H - Indication of intense sexual attraction. The Sun person affects there partner in very deep, even primal, ways.
BB's Sun in MC's 3H - Good for communication. The 3H person enjoys talking to the Sun person. Sun conjunct Moon
This alone can help out any harsh aspects you may share in your chart. For Sun-Moon is one of the best aspects to have in Synastry, especially when it's a conjunction.
"Attraction
Sun trine Mars - They may share a healthy sex life. You motivate each other in simple ways, and accept each other's ambitions, drives, and cycles of activity.
Moon opposite Pluto - This can cause a very strong attraction between the two of you. On the downside the Pluto may try to overpower the Moon person and become too possessive.
Venus square Pluto - Some astrologers say this is one of the most sexually attractive aspects to have in synastry, even if it's harsh. On the other hand, others who experienced this say it is completely one sided. Being that the Venus person is more attracted/obsessed with the Pluto person than the other way around.
Communication
Mercury opposite Mercury - This can be problematic. You might need to take a little more time to see eachother's point of views. Though this is not as troubling as Mercury SQ Mercury so it can be worked through.
Venus opposite Mercury - You can open eachother's minds to new music, arts, and cultures. The opposition between Venus-Mercury is neither good or bad. difficult communciation depends on other aspects in the chart.
Mercury square Pluto - You may have the tendency to get into pety arguments, and find it hard to have a deep conversation."
- http://www.cafeastrology.com/synastry.html
Aspects of Stability/Unstability
Sun trine Uranus, Moon square Uranus, Uranus square NN - these aspects create excitement! Though they can be very unstable if your looking for a long term relation, things between you can run hot & cold. Although having those Saturn aspects (Moon trine Saturn, Saturn conjunct Chiron, & Mars sextile Saturn) can definitely help balance out Uranus's unpredictability. Moon-Saturn & Mars-Saturn are very common in long lasting marriages.
Asteroids
Juno conjunct Chiron - The sexual passion you share is both devoting & healing. Even after marriage the passion will not fizzle out.
Moon square dejanira - The Dejanira person may become a victim to the Moon person's emotions. Maybe the Moon person has a tendency to make the Dejanira feel bad, maybe even depressed when the Moon person gets upset.
Eris conjunct dejanira - This can be dangerous and voilent for the Dejanria person. Eris is the sister of Aries & known as a Female Warrior. Ulimately dejanira needs to pick and choose there battles with eris wisely, because it could end badly.
That's the best I can do. Hope I helped :]
>> If your not a couple or don't see eachother in that light then sorry if some of the info is inappropriate