I like the US constitution and the bill of rights right up to amendment 12. Its a pretty easy read and not that long. There is a profound difference between the US constitution and other constitutions I have read.
The people who emigrated to what was to become the US were fleeing persecution from Europe. Many saw this as an opportunity for freedom from the tyranny they endured where they had come from. For this reason the the people running the states valued autonomy. The states to agreed to the federation on the condition that federal powers were limited and the US constitution and bill of rights represents an explicit attempt to limits the power of government.