I'm not sure this is a feature for others but for me it's rather annoying, almost a bug.
When I visit my own page (or any other users' page) the search field is populated with
user:160398 in my case.
Now, if you're on any other page and the search field reads
search, it disappears when you click the field and start typing. Where as if you're on the user page
user:160398 is still there when you start typing.
I know it's a small thing but it's starting to annoy me. I guess the reason is to be able to include the search name in the search and only get hits from that user?
But as I'm often on my own page as default, that
user:160398 always gets in the way when I'm doing a search.
Why would I want to search my own questions when I'm at my user page?
I'm just curious as to why it was added in the first place?