to fear or not to fear!

My lovely wife keeps reminding me that I'm not looking after myself. I'm overweight, work too much, don't exercise, eat whatever and whenever I want and pretty much am on a fast track to a big black hole. When dad was very near death I saw fear in his face. Absolute fear. I always thought there would be a peaceful resignation regarding one's own death but not for my dad. I really can't think that I have any fear about it at all. If I dropped dead tomorrow, it would pretty much be a relief. I'm not saying I want to go but just imagine, there'd be no more. I'd miss my family immensely but that would be the same no matter what age I was. But would I actually be able to miss them if I was dead? They would of course mourn me as they're the ones left to pick up the pieces but when you're dead, you're dead.