I was a competitive roller skater for 12 years.
This statement highlights a long-term commitment to a physically demanding sport, which likely taught discipline, perseverance, and the importance of practice. Having spent such a significant part of life in competition, it reflects a dedication to self-improvement and resilience. It also suggests that the speaker understands the value of dedication and hard work, attributes that can translate into other areas of life and work. Such a personal history adds depth to their character, showing a background of discipline that possibly influences their perspectives and endeavors today.