That’s hard. Because “what are you for” is different from “what party do you usually vote for”.
Things I am for: reproductive rights, and a society that helps to educate people about their various reproductive and sexual choices and provide services that help make those choices a viable option. Universal healthcare. Free education that continues though higher ed, and education that is formulated more like Finland’s than like No Child Left Behind. Regulations on the economy that keep both businesses and people honest and forthcoming. Queer rights (of which gay marriage is really low down on the list for me). Affirmative action. Gender, racial, and sexual equality. Freedom from violence. The end of the Prison Industrial Complex, of rape culture, and of child abuse (yes, I’m including spanking). Taxing the shit out of the extremely rich. Various social programs and safety nets.
But do I see Democrats as doing that? Eh, not really. Some do, but it’s often very compromised; many believe in healthcare reform, but universal healthcare is too far. Civil unions might be ok, but marriage isn’t, and they won’t spend time strengthening civil unions (and obviously, GLAAD has informed us there are no LGBT issues other than marriage). Abortion should be legal, but let’s be honest, ladies – you do need that counseling and that mandatory waiting period, minors should have to get their parent’s consent, spending taxpayer dollars to pay for one is obviously wrong, and for god’s sake, once the pregnancy is past x weeks, the fetus deserves more rights than you do. We should have sex ed that teaches kids how to use condoms, but not sex ed that teaches kids how to use dental dams, or how same-sex couples have sex (that doesn’t involves saying “by raping kids”, obviously), or a realistic and accessible talk on what domestic abuse looks like. Public school should exist, but we’re not going to look into seriously reforming it, or making sure that kids who live in an inner-city ghetto receive the same level of education as kids who live in a rich white-flight suburb. We really do need to bomb Middle Eastern countries, because each Dem candidate will appear too liberal/feminine/pansy-assed to actually win a campaign. So, despite your rather explicit instructions about not defining it in terms of what we are against, I cannot say that I vote for Democrats because they do things I like, I vote for them because the other option is Republican or splitting the liberal ticket and giving Republicans a de facto win.