The long answer is to become an Architect requires a 5 year Bachelor's Degree or a Master's Degree in Architecture. Once you have obtained your degree, you will need to complete the Intern Development Program (takes about 3 years) and then pass 6 licensing exams. Check out ncarb.org to get more information regarding what it takes to become an Architect in regards to the intern hours and tests.
The short answer is a passion for the field, design, and constantly learning in an ever changing career with endless possibilities. An architect starts out in the field as a drafter learning about how construction documents and details are created. As you learn more and gain experience you start to manage projects, attend construction meetings, and lead teams. Further along in your career, you may have more of a marketing focus to bring new clients/projects into your firm and head the design aesthetic of your firm.