Im thinking this may be the route we will have to go down, we currently have 2 year old DS and another DS due very soon. But I also Childmind so have so many toys, but they are all dowstairs and shared by everyone, it will just seem to odd to have toys that belong to each child, but I suppose those will go up in their rooms when they want to do that.
But seeing as we will have 2 boys who will most probably already have every single toy possible - because of Childminding - I expect we will do a few presents each and then maybe one joint expensive one like a game console thing or tv to share in the kiddy room etc.
I dont see a problem with it at all, I think its a good thing that they dont just expect to have everything to themselves and keep saying 'thats mine' all the time.