Partner Count thread by /u/ItchyHealth states the importance of n count is more important than age. I slightly disagree.

Divorced Parents are a more important factor. Kids from divorced parents have a higher chance of emotional issues, drug abuse, and have higher rates of pre-marital sex. It is a much more important indicator in whether someone is marriage material, since people from divorced parents have higher chances of divorce.

Sources:

"Linda Nielsen, a professor at Wake Forest University who studies father-daughter relationships, has found that the reduced presence of a father tends to harm girls’ educational prospects and physical health—as well as their marriages, which are more likely to end in divorce."

https://psycnet.apa.org/record/2012-04035-000

"Despite the robust associations observed in women, parental divorce was not associated with men’s relationship commitment and confidence. Experiencing a *parental divorce appears to have a stronger impact on women’s than men’s desires** and beliefs about the future of their own marriages. Furthermore, the experience of parental divorce by both partners did not predict any lower commitment or confidence than did the woman’s parental divorce alone. These findings echo those of previous studies showing a stronger impact of parental divorce on daughters’ than sons’ risk for divorce (e.g., Amato, 1996). It is possible that because women are socialized to be more relationship-oriented than men (e.g., Gilligan, 1982), they may be more attuned to their parents’ marital dissolution and its lessons regarding the (im)permanence of marriage. In addition, women generally suffer more negative consequences from divorce than do men, especially economically (Hetherington, 2003). Therefore, being primed to be conscious of the fragility of marriage by observing parental divorce may lead women, more than men, to suppress levels of marital confidence and to hold back on their commitment to their marriages."*

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2704052/

Divorced parents' children *earned lower grades than their peers*, and their peers rated them as less pleasant to be around

Meanwhile, adult children from divorced parents also *may be vulnerable to drug and alcohol use in adolescence, have fears about commitment and divorce, and have negative memories of the legal system.**

In fact, research shows that adolescents whose parents have divorced are *more likely to experience injury, accidents, and illness** than children whose parents have remained married.

https://www.verywellfamily.com/children-of-divorce-in-america-statistics-1270390

Paul Amato and Danelle Deboer indicated that if a woman’s parents divorced, her odds of *divorce increased 69 percent*, while if both a husband and wife’s parents divorced, the risk of divorce increased by 189 percent.

This theory states that children of divorce are more likely to divorce themselves, because they did not get to watch their parents model healthy relationship skills, things like open communication, negotiation skills, and compromise. This lack of skills, the theory states, leads directly to divorce in children of divorce.

Amato, P. R., & Deboer, D. D. (2001). The Transmission of Marital Instability Across Generations: Relationship Skills or Commitment to Marriage? Journal of Marriage and Family, 63(4), 1038-1051. doi:10.1111/j.1741-3737.2001.01038.x

Divorce researcher Judith Wallerstein explains the phenomenon this way: “...at young adulthood when love, sexual intimacy, commitment and marriage take center stage, children of divorce are haunted by the ghosts of their parents’ divorce and terrified that the same fate awaits them” (Wallerstein, 2005, p. 409). Interestingly, the finding breaks down by sex. One study found that while engaged women whose parents divorced reported lowered relationship commitment and *reduced confidence in their own upcoming marriages, the same was not true for men. Researchers note that “experiencing a parental divorce appears to have a stronger impact on women’s than men’s desires and beliefs about the future of their own marriages”** (Whitton, 2009, p.4). Women’s lack of confidence in marriage leads to higher divorce rates.*

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2704052/

In addition to an increased likelihood of being sexually active, girls from divorced families are more likely to engage in risky sexual behavior, to have *more frequent sexual intercourse, and to have more sexual partners.*In a study comparing girls from New Zealand and the United States, researchers found that the earlier a father leaves the home, the higher his daughter’s risk of early sexual activity and teenage pregnancy. In the United States, girls whose fathers had left before their daughters were five years old were eight times more likely to become pregnant while adolescents than were girls whose fathers remained in the home.14)

The children of divorce date more and thus have a *higher turnover of dating partners and more failed romantic relationships,22) which may contribute to a larger number of sexual partners,** a risk factor for the acquisition of sexually transmitted diseases and a host of emotional repercussions. Children with divorced parents tend to have lower relationship quality. Even without the addition of a working mother, divorce leads to an above-average number of sexual partners for the children of divorce as adults.*

For women who had one extra sexual partner (for most, before marriage) only 64 percent were still married—a drop of 33 percent, which is twice the rate of men. For those women who had two sexual partners outside of marriage, only 55 percent were still married five years down the road. Men and Women in First Marriage by Number of Sexual Partners. Clearly, the more sexual partners an individual has, the less he/ she is capable to sustain marriage. This is *especially true for women, who experience a steeper and more significant reduction in marital security with each additional non-marital** or extra-marital partner.*

http://marripedia.org/effects.of.divorce.on.children.s.sexual.activity

Increase in substance abuse

https://ifstudies.org/blog/substance-abuse-mental-illness-and-crime-more-common-in-disrupted-families

Almost 50 percent of all marriages in the United States will end in divorce or separation. Researchers estimate that 41 percent of all first marriages end in divorce. 60 percent of second marriages end in divorce. 73 percent of all third marriages end in divorce.

https://www.wf-lawyers.com/divorce-statistics-and-facts/