It depends what you seek through death. Some wish to die in order to be reincarnated and live a simpler life as a frog, a cat, a turtle, or just a human born into kinder circumstances.
Some desire heaven, for bliss, or to be reuinited with loved ones. Some feel they are owed hell, guilt makes them crave the pain they feel they deserve for who they chose to be in life.
Some long for the void, or limbo. There are those who wish to be a ghost, and observe. Or float off into space. There are those who want to be a mass of energy, drifting unconsciously at peace. There are those who seek pure non-existence - to be scrubbed from the annals of history and simply to be as if they never were.
Others just want an escape. An escape from pain. An escape from emptiness. An escape from a life in which they feel socially inept and unqualified for love, whether friendly, familiar, or romantic. As long as they get away from this, it doesn't matter where they end up.
Then we have those who their religious text paints suicide to be a sin, and they fear hell, thus stay alive.
Belief can make suicide more difficult, or it can make it easier. It can serve as a comfort in an end, a loved one waiting on the other side, for instance.. or it can serve as a deterrent. Whether hell, or the void, people fear both pain and emptiness.