My issue is that I think that you may be confusing your favourite films with what are the best films. They are often two different things. My top ten favourites (at the moment) are:

It's A Wonderful Life (1946)
Star Wars (Original Theatrical Cut, 1977)
Planes, Trains And Automobiles (1987)
The Princess Bride (1987)
Shadowlands (1993)
Dead Man (1995)
Heat (1995)
The Big Lebowski (1998)
Fight Club (1999)
Bubba Ho-Tep (2002)

These are ten films I could sit down and watch any time, no matter what mood I was in. Most of what I would call the best films I've ever seen do not qualify, as they are not so easy to watch.