I thought that I would pick a recent issue for the 'free choice' theme this week.
|Great Britain - Animail 17 May 2016|
These stamps are meant to be fun - on an envelope, each one is to be positioned so that the stamp you use wraps round the edge, bent along the white line which you can see most clearly on the teddy bear.
It seems to me that used stamps from this series will only be collectible if you retain the envelope or if someone ignores the instructions for use.
To see what others have chosen visit the links at Sunday-Stamps-II-78.