A tenet of the Roman Catholic faith is that our suffering in this life joins us through the suffering of our Savior and helps to complete His suffering to redeem mankind. It's one of the major reasons the Catholic Church doesn't condone suicide. Suicide, spiritually, is akin to the one unforgivable sin: "despair". I visited a friend in the hospital whose body was riddled with cancer; he was having minor seizures every few minutes. In between those seizures, he was still attempting to accomplish something for the good of others (he was discussing a fund-raising initiative with a possible donor). THAT is the kind of faith I hope I have when my time comes.
No one here wants to take that from you. Not everyone shares your/our faith, doctrine, or aspirations. Some want a peaceful end, not a heroic struggle. Regardless of what I may want for myself, it is not for me to decide for them how their end should come.