For a system administrator seeking to create a dashboard from widgets, the common types of widgets available typically include those that provide actionable insights and real-time data visualizations. The Top-N Widget offers a way to see the highest or lowest performers in a specific metric, making it a useful tool for analysis. The Metric Chart Widget is essential for visualizing various performance metrics over time. The Symptoms Widget aids in monitoring and troubleshooting by displaying potential issues. However, the Weather Map Widget, Report Widget, and Interaction Widget are more specialized and less commonly found in system administration dashboards.