What IS good, and how do we determine it?

[Brakeman]

There is no greater love than to die for somebody.

Absolutely wrong!!!
It takes nothing more than a moment's quick decision to sacrifice your life for some cause.

The greatest sacrifice is to labor daily for the betterment of the undeserving.
This is something jesus did NOT do.

I respect your opinion, but still believe I am right on this.

Really? You think it is more of a sacrifice to kill yourself than to enslave yourself?  When you kill yourself, your loss is the ability to participate in life. With Sacrificial enslavement, you have the same loss of ability to participate in life, but you have the pain and struggle of a torturous existence to be followed by death.
If someone had a choice to take the place of a condemned man at the gallows or a man condemned to the gallows after completion of 20 years torture, the choice would be easy.
Why would you think otherwise? Besides, jesus didn't sacrifice his life, ask any christian, they'll swear that he's still alive.
With todays understanding of physiology, we know that the crucified either died of asphyxiation or a cardiac arrest, very mild ways to die compared to the pain of, say lockjaw, or pancreatic cancer, so the "bad weekend" at the hands of the romans was a picnic for an immortal.