Agreed - those kinds of stories are always interesting. For all that people go on about 'how is Superman interesting; he's SUPERMAN, you can't possibly beat him', I personally think that's one of the things that MAKES him interesting, for the simple reason that he's used to being able to face any obstacle. Therefore, when he runs across something that he can't handle through simple force, it throws him a little - he has to stop and really THINK about it before he can deal with it, which means that any Superman story dealing with such matters is likely to be a fairly thoughtful and interesting one, if it's at all well-written.