I can only speak for myself...but I really don't think anyone with Sun in Taurus and Moon in Scorpio and Venus in Taurus (in the eighth house yet!) is likely to find much satisfaction or even be very happy in an open relationship/marriage, especially since Taurus and Scorpio are both Fixed energy signs. Taurus and Scorpio are both very stubborn -- they want what they want, **** it, and they're very resistant to giving that up or settling for less. You have your Sun in the ninth house which tends to be less possessive than some others -- but the fact that you have your Fixed Water Moon in the second house (Fixed Earth) and your Fixed Earth Venus in the eighth house (Fixed Water) suggests to me that romantic relationships trigger strong possessive instincts in you.
On to the aspects...
One very interesting thing about your natal chart is that your Uranus forms a very tight conjunction with your Neptune. Unfortunately, even though neither one of them is especially conventional and both of them desire excitement, they pursue that excitement in very different ways. Uranus seeks freedom -- Neptune seeks union. Your Uranus and Neptune are also both retrograde, which implies a repressed individuality combined with a high degree of sensitivity. You also have Uranus and Neptune in the fourth house of family, suggesting that your childhood may have been unusual or even a bit unstable in some way -- but this combined with your Taurus Sun and Scorpio Moon, both of which crave security and stability, only persuades me further that an open relationship/marriage would probably not be very beneficial for you.
Another interesting thing about your natal chart is that you have only one Fire planet -- your Mars in Aries. When your natal chart has only one planet in a particular energy or element, this is called a singleton -- this amplifies the energy of that planet and gives it particular significance for your chart.
Sun trine Uranus -- this is a positive aspect for the most part, but (as I pointed out above) it also implies a need for freedom and spontaneity which some people might interpret as instability and unreliability.
Sun trine Neptune -- this is also a positive aspect on the whole because it facilitates sensitivity and compassion, but it can also facilitate a certain amount of naivete.
Sun opposite Pluto -- I suspect that this is part of the reason why you have difficulties with romantic relationships. I can vouch for this from personal experience because I also have a challenging Sun/Pluto aspect in my own chart -- and the trouble with a challenging Sun/Pluto aspect in your chart is that because Pluto moves so slowly, your Sun will form this same challenging aspect with the natal Pluto of every person close to your own age! (It's a real *****...I know!) People with the Sun in challenging aspect to Pluto tend to be hard on themselves and can be their own worst enemies. Pluto transforms whatever it touches, so people with Sun/Pluto aspects tend to subject themselves (and other people) to never-ending analysis. When the Sun/Pluto aspect is challenging, this analysis can be ruthless and leave the person feeling afraid of change and/or suspicious of other people (which I think might be especially true in your case since both the Sun and Pluto are Fixed and your Pluto is also retrograde). These fears and suspicions often prompt the Sun/Pluto to manipulate other people in an attempt to control them and/or to attract controlling and manipulative people. (Take it from me -- acknowledging your desire for control and making a determined effort to resist it will be a major step in your personal growth.)
Moon opposite Mercury -- with this aspect, there's something of a conflict of interest between your thoughts and your feelings. It doesn't exactly help that they're both Fixed in your case. It also suggests indecisiveness and hypersensitivity.
Moon opposite Venus -- this aspect also suggests a conflict, this time between your emotions and your need for affection. There's a tendency to be a "people-pleaser" -- to compromise or neglect your own emotional needs in order to maintain the peace and earn appreciation.
Moon inconjunct Mars at close orb -- yet another conflict, this time between your emotional needs and your sexual appetites (also your expression of anger). The inconjunct is the hardest of all challenging aspects to work with because there's no common point of reference anywhere -- both the element and energy are incompatible (in this case, the Fixed Water of Scorpio versus the Cardinal Fire of Aries). I imagine that expressing anger effectively is a struggle and that you tend to either bottle it up (Moon in Scorpio) or explode (Mars in Aries). This aspect also suggests that your sex life is often physically satisfying but emotionally frustrating or vice versa.
Moon square Saturn -- this is a rather weak aspect in your chart but I think it still counts, and it's a difficult aspect to work with. Saturn in challenging aspect tends to block or inhibit whatever it touches -- which in this case is your emotional expression. People with this placement find it difficult to trust others with their feelings.
Venus square Saturn in close orb -- I won't lie to you. This is a very challenging aspect indeed and I suspect that it's the primary source of your difficulties, especially since your Venus and your Saturn are both Fixed. Saturn in challenging aspect tends to block or inhibit whatever it touches -- which in this case is the expression of affection. Venus says "let's do this" -- Saturn says "no." Saturn is also in your fifth house of romance...and I know from personal experience that romantic relationships tend to be a struggle for people with this placement.
Venus trine Uranus -- a positive aspect which suggests a willingness to tolerate differences but, as in the case of Sun trine Uranus, implies a need for freedom and spontaneity which some people might construe as an indication of unreliability.
Venus trine Neptune -- this aspect implies a desire for love to become a transcendent experience and facilitates romantic fantasy, but it also suggests a certain passivity when it comes to asserting oneself.
Mars inconjunct Jupiter -- a challenging aspect which suggests that you end up expending too much of your physical energy trying to be generous to others and that there's something of a disconnect between your passions and your overall philosophy.
Hope this helps...
. Traditional still doesnt help with the fact I feel my needs are not being met...Would you say traditional gender roles as well? Homemaker?
of course of course. Just kidding...I'd love to do some artistic thing but I guess I'm really good at self-sabotaging my efforts. I see Venus ruling second house=money but with apposing pluto? How would that work? Inner transformation?