If your Composite Sun is conjunct Venus....
This aspect signifies that you just plainly love each other. The attraction is so strong between you that even though you may be incompatible by other standards, you still feel like being with your partner because of that love you feel for them. It's not that they won't occasionally drive you nuts - they will. It's just that the bottom line is that there is real love between you and there is no stronger emotion in the universe.
By being together you can create beauty and form as well as appreciate art and music. Your home can easily be filled with "treasures" that reflect the talents you have. But as always with Venus, be careful of overindulging in the good things of life so they do not become a noose around your neck instead of an object of desire. Remember, the more things you have, the more trouble you art likely to have. You will not mind showing off what you have accrued together, but vanity can become an undesired side effect of this aspect if it is not kept in check.
Avoid hiding any difficulties in your relationship and bring them out in the open so they can be resolved or at least recognized in order to avoid major problems down the road. You may also be drawn to speculative ventures with this aspect, so just remember to be practical in your expenditures.
With this configuration, no matter what difficulties come along to challenge you, you will always feel a need and desire to make peace, reconcile and create harmony and cooperation in your relationship. This aspect offers a great stability that will keep you from turning against each other, unless the obstacles become totally overwhelming.
A great deal of time and effort can be put into social activities and if you are involved in creative ventures together, then this aspect adds support and form to your ideas.
This interpretation is from the Relationship Composite Report.
Do you and your partner have Sun conjunct Venus in your Composite chart? What's it like?
I love this one so much 
I have it with my 3 best friends. Mercury is snuggled in the conjunction too.
My SO and I have this. Jupiter Chiron and Mercury are also conjunct sun and venus as well. Venus is at the end of the 7th house and everything else is in the 8th.
This shows up with both Caps. 
I actually do have this one with my husband in our composite chart...
My wife and I have this. We actually have Sun, Venus, and Mars all conjunct at 13-14 Aries. Our composite Moon is directly opposite at 14 Libra, but in the Davison chart it joins the others in mid-Aries to form an uber-conjunction.
Interestingly enough, our natal Suns are in direct square and our natal Venuses in direct opposition. For both of those aspects the midpoint is the same - 14 Aries.
My natal Jupiter is at 14 Aries and my wife's natal North Node is at 12 Aries, so I think having all those composite planets there is a good thing.