I like having titles that just last for one post - you have ones for 666, 1337, etc.; numbers that are special in some way. 401, Poster Not Found.
So then, say uh in the 3000's you were a Cartographer, but you wanted 3333 to be So Many 3's. You change the title at 3333, then have the Cartographer title for 3334. So it's two new title entries for each new title, one just reinstating what was going on.