Advice on door rattle

[Big08f250]

Im not sure what is wrong but my driver side door rattles a little and when I shut it it almost sounds like it bounces back or dont shut but it does or at least its not loose or wont move by me touching it... It dont sound like the other 3 door do when it shuts any thoughts or ideas? Nothing appears loose other than a little I mean very little slack if u pick up on the door..

[Evil Eye]

Mine makes a rattling sound a little bit as well, but it isn't very consistent. I haven't found anything that cures it, but I usually open and slam it shut again. Like I said, it isn't consistent so I haven't been able to track down the reason.