Philosophy can be interesting if it is not baseless navel gazing (i.e. it is founded on observation and fact, and derives from there). The fact that I find that interesting is subjective, but that's not the meat of the post.

Religion is fundamentally folks saying "No, I'm right!" and nothing else. Sometimes it's dressed up a little. What could be interesting about that? You can hear such arguments in any primary school playground during recess.