What, precisely, is it about our Constitution that you would change and why?
First of all it is not the Constitution as a whole that is the problem, it is the abdication of powers already granted and the usurpation of powers beyond the constitution by our elected officials and non elected judges, and bureaucrats.
1)Term limits for congress, senate, and judges.
2)Balanced budget/line item veto authority.
3)Definition of US birth right citizenship for eligibility for benefits.
4)creation/dissolution of administrative departments (EPA, Energy, etc) and limiting their “rule” making powers.
5)repeal other amendments that weaken the 10th amendment.