Keeping my bike clean?

When I got the Thorn Audax in January last year, I felt like an excited school boy with a new shiny racer.  It's always nice to have a beautifully maintained and lubricated bike but I became very self-conscious in the early days with spokes glistening in the sunlight.

Soon I saw it differently and have continued to keep a certain amount of dirt on the bike.  Here's why I keep it with a little dirt on:

• Attracts less attention from would-be thieves, blending in makes me feel a little more modest
• Maximise cycling time, instead of fiddling around keeping it clean
• It's good to keep the chain extra clean: this will really reduce the rate of wear and extend the life of the chain and sprocket
• Not setting myself up as an expert cyclist
• Becoming more interested in the mechanical side could turn out to be expensive.... "ah I could do with upgrading X and while I'm at it I might as well do Y at the same time.  Then I'll need special tools for doing this and a workshop stand" and the list goes on and on....
• BUT I am less likely to spot something that's worn or about to fall off
• "If it ain't broke, don't fix it"

What about you?  Do you clean your bike?