Being a Seven means keeping a list of things to watch/play/read, and even though it's already too big to finish in one lifetime, you still worry that you will run out of interesting stuff to watch/play/read.

Being a Seven means constantly trying to juggle all your hobbies so that you didn't have to relearn everything from scratch every time you switch your focus to another hobby, but in a way that you're still not forcing yourself to do things you don't want to.

Being a Seven means experiencing profound horror when you realize just how much of life involves doing things you don't enjoy but that are necessary.

Being a Seven means trying to maintain a balance between planning your life to achieve maximum enjoyment and still leaving an option to stray from the plan.

Being a Seven means realizing that the happiest moments happen when you aren't expecting them, which means that there truly is no way to make them happen at will.

Being a Seven means realizing just how much time you spent trying to make the 'future you' happy, but now that you ARE the 'future you', you're still not happy at all.

Being a Seven means disintegrating into type One and feeling like you're standing on a tightrope, constantly trying to maintain perfect balance.

(P.s. This is just my personal experience that relates to my Enneagram type, one does not have to relate to all of this to be a Seven.)