Centering monospaced fonts

My blog’s header used to look like this:

I thought using a monospaced font was a good idea – I’m a programmer (and a bit retro) after all. Yet I couldn’t help but wonder what looks wrong there. Did you spot the problem?

I don’t have a very sharp eye for fonts, so my only way of detecting monospaced fonts is by checking whether the characters in subsequent lines are aligned, like this:

I centered the text on my header, which messed things up:

That looked just weird, I’m sorry about that. I wasn’t able to give up yet, so I tried to fool around with a pre block. It did align the characters properly, but there was no word wrap and no links, so I gave up and used a proportional font. I’m quite sure that my colour selection is a clear enough sign of geekiness 🙂