Joshua Platt shares his own thoughts on owning your own content. He agrees with my sentiments, but adds that this type of thing can also lead to more tinkering than actual writing.
That's an excellent point. I've tended to stick to a cycle of a refresh of my site every 2 years. I deviate occasionally, but the desire to tinker with the design occurs far more frequently than that. But I force myself to leave things as they are when that happens.
I admire those like Shawn Blanc, who write far more than they tinker. Others, like John Gruber, could make things a little easier to read. But in those cases, as well as those who change more frequently like myself, I simply appreciate the care they put into creating their own home.