One of the things I hate about the joy of postbacks is losing my scroll position. On a page that's a bit longer than the window, if I have an auto-postback combobox (for example), the user selects an item, the page posts back, and poof! they're back at the top of the page.
On a corporate intranet the post back is nice and fast, and many times the user has no clue that it happened.... Except for the fact that the page just "jumped" back to the top.
Because of this I (as many people) write my controls to re-position, or I have page...