Cancelled mine this time last year after 30 years and it was one of the hardest decisions of my life. I'd started to think about it 2 years earlier and it caused me a lot of sleepless nights and stress. Reasons for cancelling included Ashley, Pardew and a family bereavement.
I still listen to or watch every game from the comfort of my armchair, however, I can honestly say that, so far and very surprisingly, I haven't regretted cancelling it once.