Although your title is a little off to me. God can and will place perpose filled choices in a Christian's path. As you said it is our choice to under take them but they are none the less there. So I don't nessarily place destiny as the same as haveing a perpose filled existence. Take Noah for example God had a plan for him even though he ran away God still used him for his perposes he just had to convince him a bit lol and also true freedom is following the author of humanity. The one who knows you better than you know yourself.