Google Suggest used to show a list of previously typed searches if you were logged in to a Google account, so you could quickly select the query without having to type it again. But, Google Instant missed the Web History integration.
This feature is now back in Google Instant. You'll still see up to 3 suggestions from your Web History, but the "Remove" link is more visible and personalized suggestions have a different color.
Unfortunately, Google shows too many suggestions from your Web History and your previously typed searches are very likely to become predictions. For e.g., if you've searched for [Microsoft Tellme] two days ago and you now start to type "micros", Google will display the results for [Microsoft Tellme].