This is a great question. As with online classes, opinions may vary or shall i say it all depends on the situation. I will use myself as an example. I am a horrible math guy, I took Survey of Modern Mathematics online, and it did not turn out so hot. I ended up re-taking the course.
So, i guess to sum it up, if you would take an online course. You would want to take something that you know you can handle and does not need “live or one-on-one” interaction. For something like, a lot of reading, and some small interactions required such as posting on discussion board, it doesn’t seem to bad.
Online classes i think are not self-paced since there are some deadlines and required number of hours logged in to be able to successfully complete the course.
There are both advantage and disadvantage of online class.. For some easy A’s, i will definitely take online class..