I missed this question.
Did Satan have a "free choice" to choose to reign in hell? If so, do angels today still have a "free choice"?
As boatbums explained, most people believe that Satan fell not because he had a choice but because of pride. There is some evidence to support this claim although we'll never know. I personally think (and this is Harley's explanation mind you) that Satan fall was like Adam. In both cases, they lacked the wisdom of God to make the right decision. Rather than ask God for wisdom from above, as we are commanded in scripture to do, they decided to follow their own course.
When we depart from being dependent on the Lord, we will fail. Which is exactly what the Lord is trying to teach us as Christians-to become more dependent on Him. The other 2/3 of the angels are totally dependent on the Lord.
Angels were created with their own will. They are not automatons. The rebellion of Lucifer and 1/3 of the angels by itself indicates that. Scripture does not indicate that that has changed.
When we depart from being dependent on the Lord, we will fail. Which is exactly what the Lord is trying to teach us as Christians-to become more dependent on Him. The other 2/3 of the angels are totally dependent on the Lord.
What is our purpose, Harley? Revelation 7 gives us a description:
Revelation 7: 9 After this I looked, and there before me was a great multitude that no one could count, from every nation, tribe, people and language, standing before the throne and before the Lamb. They were wearing white robes and were holding palm branches in their hands. 10 And they cried out in a loud voice: “Salvation belongs to our God, who sits on the throne, and to the Lamb.”
11 All the angels were standing around the throne and around the elders and the four living creatures. They fell down on their faces before the throne and worshiped God, 12 saying: “Amen! Praise and glory and wisdom and thanks and honor and power and strength be to our God for ever and ever. Amen!”
13 Then one of the elders asked me, “These in white robes—who are they, and where did they come from?” 14 I answered, “Sir, you know.” And he said, “These are they who have come out of the great tribulation; they have washed their robes and made them white in the blood of the Lamb.
15 Therefore, “they are before the throne of God and serve him day and night in his temple; and he who sits on the throne will shelter them with his presence. 16 ‘Never again will they hunger; never again will they thirst. The sun will not beat down on them,’[a] nor any scorching heat. 17 For the Lamb at the center of the throne will be their shepherd; ‘he will lead them to springs of living water.’[b] ‘And God will wipe away every tear from their eyes.’[c]”
If we do not depend upon God and His Mercy, then we will not fulfill our created purpose.