In the context of:
USA - slightly left of center
Europe - slightly right of center
Internationally - fairly leftist
I am a liberalist. Liberal democracy, etc. Free trade, etc. Fair and open elections, free press, free religion, and welfare programs affording for the poor, unemployed, and sick. Government should provide optional public school, healthcare, post, etc. Foreign policy should be ethical and respectful, focused primary on maintaining peace and minimizing intolerance/injustice. I am a big supporter of the UN, and any supranational organizations. Oh yeah and unions and subsidies do way more harm than good. Much much much more moderation is needed there. When unions cause a company to collapse and the economy to get worse just because workers want a pay raise... that's idiotic. Not saying unions shouldn't exist, they should just be much more responsible. And subsidies are unfair and cause starvation, etc.
Let me put it this way. If the US stopped farm subsidies, we would have significant economic/agricultural problems to be sure, but starvation would taper off in places like India and Africa. They have the capacity to be net exporters of food, but don't due to subsidies. Result: starvation and aid which intensifies the issue.
So that's it in a nutshell. On ethical, moral or social issues I think the government should be evenhanded and unbiased, fair and just. It should respond to the evolving moral standards of its people. So that covers gay marriage, abortion, euthanasia, etc.