our teacher recmmended a sports person, singer,favourite movie with a particular scene you enjoyed.. personally i'm doing a a trip to paris I took during the year. There's lots of info on holidays etc :)
Do a document obviously that you have an interest in. Sports, music, cars, politics(Bexit,Tump) Maybe pick a document that has more than one picture on it that are from two completely different topics. Do this so that if you are in the exam and you forget one or two things then you can switch over to the other picture and Doing something original is good as examiners hate listening to the same crap all day. Be unique from the rest.
as an experienced french teacher, my advice is that the more general topics such as holidays, sport etc are broad and more difficult to cover. A topic that has worked well for our students in Hewitt College is that of an inspirational person.
this link should give you some ideas......http://www.oddee.com/item_96763.aspx
Try and avoid doing something that is likely to come up anyway. The idea of the document is to include vocabulary and give a perspective you probably wouldn't give if you didn't do one. An examiner is nearly always going to bring up a holiday you've gone on, and your sports team or favorite band etc. can come up a million different ways through your hobbies, how you relax, school sports teams. As well as that, your examiner will already have gone through tens of students before you, both pass and higher, and a large chunk of them will do something generic like holidays so its good to do something unique and different that the examiner might not have heard before. Of course, choose something that you genuinely like or are interested in and that you can talk about for a good few minutes.