Offering many advantages to adult learners, e-Learning is now being recognized--and preferred--by more and more people, resulting in an increased number of distance learners in recent years. Numerous research studies focus on learner preferences for online learning, with most converging around the individual characteristics and differences, if not the features of the technology and pedagogy used. For Turkey, the situation is also similar, with the number of adult learners who prefer online learning increasing each year due to several reasons. The result of this is an increase in the number of online programs offered by many universities. Hence, this research study has been conducted to reveal the prevailing factors causing learners to choose online learning. Through this qualitative research regarding online learners in a state university, it is found that having a full time job, accessibility and flexibility, individual responsibility, effective time management, physical distance, institutional prestige, and disability are the common factors for under graduate and graduate learners in their preference for online learning. Awareness of these factors can support the stakeholders while designing e-Learning from both technological and pedagogical points of view. [For the complete proceedings, see ED579335.]