taimatsu no monogatari

I am tagging some entries, and have noticed that I have classified memes/quizzes/etc. in a particular way. I have 'questions', which goes on those long write-your-own-answers quiz things, which are often quite interesting and do tell you more about the writer. This also goes on the 'ask me five questions' idea. I have 'meme' which goes on other things which have a similar value in telling you more about the person answering - these must usually require thoughtful written input. I have 'sillymeme' which goes on the sort of thing which is fun and pleasant but not particularly illuminating (like the Christmas Stocking toy or the Mystic Pig) - and then I have 'stupidquiz' which is for 'What Kind Of Christmas Decoration Are You?!?' and suchlike fooleries.

How do you mentally classify such things?