Quiting Games

How one badly-placed checkpoint made Ars Technica wonder… what makes us walk away from games?  This is a fascinating area of debate within gaming.  Their superb article ‘Why we quit: the moments that push us away from gaming’ is well-worth a read, and merits further discussion.  I can totally relate.  Bad checkpoint placement for example, can ruin a game’s flow.  How do you feel on this?