Atheists who announce "I'm good without god"

[The Grand Nudger]

I see morality as subjective because it depends on the characteristics of humans and is not an aspect of the larger reality.

So does everything we do.  Think of some thing we do you might consider objective.  Understand that your classification of morality as subjective on those grounds also reclassifies that thing.

For example, I would not expect a race of beings from a different star system to have the same moral sensitivities. Morality is not objective in the sense of being independent of observer. A non-human observer would likely have different moral views to ours.

That people are subjective beings does not necessitate that a moral system be meaningfully subjective.  If morality were objective...it would still be the case that a subjective being is utilizing a system capable of objective classifications.  Two different things, there, which can be simultaneously true.

The rules are NOT arbitrary though. The basic rules are determined by human nature and what sorts of rules promote human well being.

Is either subjective?  Is "human nature" decided by the opinion of some person?  Is "wellbeing" a matter of opinion.  If I decided to change my opinion about assault, would that change anything -about assault-? 

Just like the question of whether injesting cyanide is bad for your health isn't socially determined, neither are some of the basic moral positions.

In what sense, then, are they subjective...beyond the fact that a subjective agent is describing the positions?