I got new windows, and they threw in a free front door, which does look pretty fabulous.
I made a long, long list during our totally broke with young kids years, and besides the windows, we've had the roof replaced, the living room floor replaced, some basement work done and then a new deck built outside the back door (those two went together for complicated reasons!), both bathrooms remodeled, the kitchen remodeled, and the driveway replaced.
I am very, very happy with all of these projects, and am now very reluctant to move!