The correct answer to this open question is the following.
The elements of today's American culture that remind me of the country's colonial past are the ongoing demand for civil rights for African American people and other minorities groups, terrible racial issues that still deeply divide the United States, the demand of the common-US citizen for better public services such as the health services, and the economic struggle of the medium and lower classes to make a decent living under difficult economic times.
Colonial America was a difficult moment in the history of the United States because people had many struggles when living under the rule of the English monarchy. Political and economic problems such as the heavy taxation imposed by the English government such as the Stamp Act, the Tea Act, or the Navigation Acts. The fact that colonists did not have a voice or representation in the British Parliament. Aggressions such as the Boston Massacre.
So today, there are still many issues to be solved in the United States, which problems are similar in proportions to what colonists lived in the 1600s-1700s.