Reason #3 - I'm not going back
We are not as bad as could possibly be...but all possible parts of us are touched with bad.
When Adam fell, sin entered the world. As a result, we are all sinners. "Total depravity" doesn't mean that we are as wicked as we can possibly be. It does mean that every single part of our being has been tainted by sin. Our "will" (ability to make decisions) has been so tainted that not a single one of will willingly, of our own accord, turn and follow Christ. Because of our sin nature, no one seeks God...no not one. We have all gone astray. When left to our own devices, we will...we MUST...act according to our nature...and the nature that we are born with is a sinful one. Without the Holy Spirit's effectual call, we will continue the path of destruction, unable to choose any other path.