As many people here, I also believe there is nothing after we die. I was born in a catholic country in a catholic family, but throughout my life I've seen that most of it is just for show, for "what will people say". I started having very serious doubts about all that and having trouble making sense of what religion is saying at around the age of 6-7 and by the age of 10, I became a 100% atheist. To me, the religious believes or how they picture this whole "afterlife" could not be put into any logical whole even at such an early age.
I know there are people to whom this belief brings some kind of solace (?), hope (?), helps them somehow and, as long as it's not this oppressive, organised, self-righteous religion used to order others around, I have no problem with that.
To me, however, the certainty that as soon as the electrical, chemical and whatever other kind of activity in my brain ceases, I will be no more, feel no more, experience no more, is a source of great relief and feeling of peace. I cannot imagine any kind of world where I could be myself and not be a worthless, poisonous and at the same time miserable and suffering being. If I were to change in some diametrical way, have my believes, opinions, fears, desires, needs completely altered, I would no longer be myself, and if it was no longer me, then it would mean that my existence was over. And if I stayed myself, it would essentially be just what it is now so the thought of my existence continuing past my ctb-ing would bring utmost terror to my heart. I'm fortunately quite sure that it would not be possible as we do need our brain functioning to keep existing.