I wouldn't call mine a life list, per say.  I have a book log of every book I read. Ii write reviews so this helps keep everything in line.  Every time, I buy a book the first thing I do is log it down.  It doesn't matter what book it is.  I've even started a book log for my girls.  Our latest entry was all four of the "Twilight" series. by author Stephanie Meyers.  I haven't read them myself with working on another review and getting ready for a contest.

My girls say it's a good series( their 16-11) and their addicted to the title character Edward Cullens or it could be the actor who plays him.

But I do see what you mean about books being a life list or even a time line of where you were to where you are right now.

Happy Reading