Why is it...?

Why is it that every time I finish a great book, I just cannot decide on which book to pick up next? 

 

Seriously, nothing on my shelves - physical or otherwise - is calling out to me. 

 

Do I just pick one? Do I pick one that I have low expectations of? Do I pick one that I have high expectations of? Do I pick one by a favourite author? Or a favourite character? Or a re-read? 

 

WHY IS THIS SO HARD???