Although you say you intend that this guide/list would only be for yourself, if there is no other literature available giving information of the routes at this crag, it is near inevitable your information will find its way into other rock-clasping hands. You may intend to compose this info in an editorial-free fashion, but that is boring as hell and cheats the reader/climber of added tidbits and insight into the routes.
Have some fun with this labor. Beside the basic info of ratings, gear, FA party, etc., you should give some indication of what routes are your favorites and why. If you don't like awarding stars, at least provide a list of personal favorites (regardless of rating) to help "guide" a climber in their limited time at the crag.