Many researchers have proposed different models to identify students' learning style. Are you considering the students' learning style before creating an online course? If so how do you offer the course for different style groups?
You can use a test defined for these models that helps in identifying learning styles. In my thesis I use MBIT test, and learning management system called LAMS as it helps in branching different groups to different course presentation.
What an interesting question. In the past (but before it was online), I chose to study with the Open University because I was in full time employment, so this mode of learning suited my lifestyle. I thought, when I read your question, that online courses may be of choice for some students for similar reasons, but saw an interesting paper that does mention a type of student who may prefer to study online - to quote:
"Online distance education was their preferred learning style, e.g., shy students have a voice online and feel more comfortable participating in the online environment, and other students enjoy working at their own pace to better understand material being taught."
Lorenzo, G. (2015). A Research Review about Online Learning: Are Students Satisfied? Why do Some Succeed and Others Fail? What Contributes to Higher Retention Rates and Positive Learning Outcomes?. Internet Learning, 1(1), 5.
But I'm sure that there is more to it than this I am not an expert on learning styles, but. especially online, there could be the chance to join a 'virtual community', also to work alone, to have visual and auditory input and certainly, I used to do all sorts of practical work in science modules.