When

When work is but some means to put food on the table and a roof over your head

When work is not totally off-putting

When work puts you in touch with good friends

When work has become rather familiar to you (though not necessarily likeable) 

When you can't see a better patch of grass to set up tent on

When you are afraid of disturbing the clockwork routine and time schedules established over the years

When pull and push factors are simply not compelling enough

When 9 fruitful and life-changing years has been spent in one place 

...

...

I guess

You stay on