Which do you think do you prefer to go towards?
Serious threads are usually the ones that go deep and are increasingly long, depending on the question or the problem.
Laid-back threads are usually just there to spike up a discussion, whether it be stupid or intelligent. Or maybe just both.
For me, I guess it would be a little of both. I do take serious threads seriously but when it comes to laid back threads, it's just easy-going for me.