I think it's fine to try an discover things about Satan, as long as we have deep roots in Christ first. It would be foolish to ignore the reality of Satan, and Hell, and just "think happy thoughts" all the time. Let's face it, this world ISN'T all happiness. But at the same time, if you're trying to learn who Satan is more than who God is, probably not a good idea.
Just my opinion on the subject.