For the last couple of years, each train line on the London Underground has been given its own voice. Ed Jefferson analyzed the lines' tweets to assign Kiersey/Myers-Briggs psychological temperaments to each. [via MeFi]
You might think that Waterloo & City Line couldn't even have a Myers-Briggs Type, being a tunnel in London with some trains in it, but you'd be wrong. Whilst the normal way to establish a Myers-Briggs Type is get someone to fill in a questionnaire, it's apparently possible to use a sample of text to analyse the personality of the author. And while the Waterloo & City Line didn't have much to say for most of its 115 year history, for the last couple of years, it, and all the other London Underground lines, have been tweeting. So I use samples of tweets to discover what kinds of personalities they have.
I just took the test (an enneagram-style sorting hat of dubious scientific rigor) and join the Waterloo & City Line in being an ESFP.
Regardless of type, of course, the Northern Line (ESTJ) is a complete arsehole on Friday nights. One interesting takeaway: the results suggest that two or three individual writers are handling all the lines.