I think that we should eliminate personal pages, but more importantly, we should eliminate the notion that personal pages are ones own to do with as one sees fit. Every wiki page should be open to edit at any time.
There's a tension between the wiki philosophy of edit-anywhere and our traditional feelings of authorship, and this tension comes out most strongly on personal pages with commentary. In an encyclopedia article, no one gets mad if someone else edits it -- we all agree that this is what we are here for, after all. But in personal pages, people are getting mad every day about edits. That's because they think of themselves as the "authors" of those pages.
I've got a few of them myself -- my statement of principles, for example.
I think that's a bad idea, even though I've done it myself. I support proposals to move commentary out of the wiki, but I don't yet support any *particular* notion of how to do it. A separate wiki? A separate namespace? There are pros and cons to either, I think.