Governance is the process of decision making and the process by which these decisions are implemented or not implemented. Unlike government, governance includes all the stakeholders. Three main stake holders of governance are civil society, state and market. These three make governance at national. Good governance is a normative (opinion based) concept. Good governance includes parameter, such as it is participatory, consensus oriented, accountable, transparent, responsive, effective and efficient, equitable and inclusive and follows the rule of law. Fore further information on this topic, click here.
Different agencies calculate governance standards. These include World Bank, Asian Development Bank, UNESCAP, etc. Here I will tell you a website where you can find governance percentile rank ( more rank near 100 more high is the governance level) of your country through parameters such as government effectiveness and efficiency, rule of law, voice and accountability, etc. You can compare the rank of your country with other countries and the rank of these indicator under different political regimes.
Go to this website http://databank.worldbank.org/data/views/variableselection/selectvariables.aspx?source=Worldwide-Governance-Indicators
You will see Country, Timeline, and Series. Select the wanted series (parameter), timeline, and country. If you will select two countries then you can compare the selected indicator over the selected timeline.
After you have selected your required information look at the information given in the top right corner. You would see table, map, graph, etc. Click on the type in which you want to use this data. You can also download graphs in excel sheets and the click line graph icon to form a line graph.
With these indicators you can have informed opinions. You can argue on the basis of facts.