Interesting thread. I'm a Christian but I'm not sure quizzes like the one you posted are that helpful @Vincitveritas - not wanting to offend you, but I think a few questions designed to show we're not perfect isn't going to be very compelling for most people. For one thing it doesn't really explain the concept of sin, and the idea of being sinful or even the existence of sin is really off-putting to modern sensibilities, so that needs a deeper discussion.
A lot of people will say well we have a different understanding today of what causes negative behaviour and a much of it comes from pain and trauma, so we should be kind to ourselves and not carry all this shame and fear around. And there's some truth in that. So how do we reconcile that as Christians?
Then there's this strain of evangelicalism which I think is where the quiz is coming from, that basically hinges on persuading you to accept that you as a person are so utterly reprehensible, nothing you do can ever really please God, and as a right-thinking individual the only thing to do is accept that and then 'say yes to Jesus', at which point you're all good and off you go (obviously that's very oversimplified!)
But even in the Old Testament before the Messiah came into the world there were people God described as righteous, good men and women who were doing their best to follow his moral laws. So it's not true (Biblically) that we're completely bad.
None of this is me saying I don't believe in sin, I absolutely do - and to the poster who claims "I'm not imperfect, I'm perfectly human" I would say I'd love to have what you're having**! I'm not saying this because of low self-esteem and hang-ups, I just know myself and even on my best day I'll have the odd uncharitable thought or I'll get short-tempered and things like that, which may not seem like a big deal to you, but even if you take God and His holiness out of the equation, I would rather not be like that. I both have good and bad in me as a person (and yes I know it sounds very unenlightened to put it like that but it works for me).
**Thankfully I have the Holy Spirit who is helping me get there!
But I think the world would be transformed if humanity as a whole didn't have these tendencies - to be prejudiced or hateful, or selfish with our resources, lacking compassion, agressive, exploiting other humans (including sexually), if we were perfectly forgiving and generous and all the other things we aspire to. That would be peace on earth, in the full Jewish sense of 'Shalom'. So yes I do think there is sin and brokenness in us which is somehow part of our nature, and yet not what our deepest selves are longing for. And trauma and psychological pain and acting out are all part and parcel of that. Christian teaching also says that this brokenness affects the physical world, causing things like disease and ultimately death. We're not necessarily morally responsible for sin, in fact you could actually view it as a kind of sickness which Jesus came to heal. The how and why of which I will leave to another post because this is way too long already!
So that's just some thoughts on the Christian worldview which I hope are helpful for someone.