Brother James,
You said,
'Are we only partially depraved?
If sinners were Totally Depraved not one of us would ever have been able to receive Christ. We are tainted by the old nature/Original Sin, but we still have in tact as sinners, a mind to understand the Gospel when preached or witnessed to, we have a conscience and know, as sinners, when we disobey both God's law and civil law. We have a will which can either listen to the call of the Spirit [Revelation 22:17a] or one that will reject Jesus' offer. [Revelation 22:17f]
The Scripture does not say that we are dead as in a corpse, but rather our 'spiritual death' is in trespasses and because of our sins because we are sinners. [Ephesians 2:1b] In fact we are ' . . . the children of wrath.' [Ephesians 2:3c] As sinners they are children of disobedience because of an ungodly spirit from this world, that merges with their human spirit, driving them to disobedience. [Ephesians 2:3]
In Ephesians 5:14 the Apostle Paul tells people to awake out of sleep, and arise from this spiritual death, because Christ is ready to give you light. The sinner's human body is very much alive and has a proclivity toward sinning, which, of course, requires of God giving them eternal death. In fact, before they receive Jesus they are already doomed to the abyss.
We who have heard His Word and believed in Christ are promised by Him, the gift of everlasting life. I do not think that anyone can fully explain this eternal life concept. [John 5:24]
'Seems to me there is a difference between being dead and just being sick.'
Our sins, as sinners, have incurred our total estrangement toward God; to be renewed into His light and life we must believe. [Acts 16:31]
I would not say we are 'sick' either, but in spite of our being tainted by our sin nature, we have never lost our resemblance to the Lord God. [James 3:9] which was written down in His Word approximately 4,400 years since Noah's Flood, which of course, was after the Fall in the Garden of Eden.
Any way, the Lord has an infinite nature, spirit, body,mind and will. Sinners never lose these characteristics while they live on this planet called earth. So sinners have a receptive nature, spirit, body, mind and will when moved on by the Holy Spirit. If they reject the call of God they, of course, can remain in their sins which will lead to the flaming fires of Hell.