When I applied, they wanted a piece of Washington State ID/Drivers License or Military ID. I can't remember if they asked for a social security card or not. They asked address history for the last 5 (or maybe 10?) years.
They asked about criminal history.. specifically felonies and domestic violence.
It was pretty straight forward. After filling out the paperwork, they brought me in the back, ran my fingerprints through their database. Everything was clear. They told me I'd be receiving my license in the mail within the next week. I got it in two days.