Crazy photography project #1: Self-portrait in washroom/restroom

Mirrored, originally uploaded by jiihaa.

Many photography sites publish regularly (sometimes even daily) how-to or do-it-yourself type articles or themed photography exercises.

I have found these more funny than useful, although sometimes they may provide an interesting view on the photography practice. In a similar way, I'm interested in the work of certain photographers who tackle a single subject and beat it to death with endless repetition of the same idea.

What kind of things would be feasible for a photographer tackling a single topic and continuing with it for ages, or at least dozens or several hundred photos?

Here is a possible topic for someone to try out: self-portraits taken in the washroom/restroom mirror using a mobile phone. (Terminology is bit of a problem - washroom/restroom/public toiled - you get the idea. Here in Finland we just say WC.)

I'm sure you could find all kinds of interesting interpretations for such a series. A commentary on the modern life, a glipse of a reality often hidden, anguished glimpse into the scenery of modern life... I'm not going to try this, you are welcome to the idea.