Are the Christian, Judaic, Islamic views of human nature on original sin and what life was like in the Garden?

They're all wrong about what happened in the garden. Here are some fragments that I discovered myself on a recent archaeological dig:

...it was the Tree of The Knowledge of Good and Evil, also called the Tree of Truth and Wisdom. There was a Snake in the tree, and Eve often had long, stimulating conversations with it (the Snake, that is--the Tree only listened, Listening being one of the fundamental natures of Trees). Adam usually could not be bothered to join in these confabulations; he was often too busy with the typical male reaction to discovering that he was naked...

...Eve ate the fruit and became very wise immediately. She shared this beautiful gift with Adam. They didn't get kicked out of the garden; they abandoned it, because the troll who occupied it was always harassing them, creepily ogling them and setting traps...

I'm not sure about Islam, but Judaism doesn't possess a concept of "original sin". This is a Christian invention designed to give some sort of reason for Jesus to exist in the first place.

However, the Jewish and Christian views on what life was like in the Garden of Eden are probably relatively similar - they're based on the same texts after all. I'm not sure how closely the Islamic version of creation events follows the biblical one, other than in general direction.

Judaism regards the advocation of any of the divine commandments to be a sin. Judaism teaches that sin is an act, and not a state of being. Sin is any thought, word, or deed that breaks Gods law by omission or commission.

Islam sees sin as anything that goes against the will of Allah (God). Islam teaches that sin is an act and not a state of being.

In Western Christianity, "sin is lawlessness" (1 John 3:4) and so salvation tends to be understood in legal terms, similar to Jewish law. As in Eastern Christianity, sin is also viewed as a relational problem. Sin alienates the sinner from God. It has damaged, and completely severed, the relationship of humanity to God. That relationship can only be restored through acceptance of Jesus Christ and his death on the cross as a sacrifice for mankind's sin (see Salvation and Substitutionary atonement).

In Eastern Christianity, sin is viewed in terms of its effects on relationships, both among people and between people and God. Sin is seen as the refusal to follow God's plan, and the desire to be like God and thus in direct opposition to him (see the account of Adam and Eve in the Book of Genesis). To sin is to want control of one's destiny in opposition to the will of God, to do some rigid beliefs.

In Russian variant of Eastern Christianity, sin sometimes is regarded as any mistake made by people in their life. From this point of view every person is sinful because every person makes mistakes during his life. When person accuses others in sins he always must remember that he is also sinner and so he must have mercy for others remembering that God is also merciful to him and to all humanity.