Don't care, I'll be dead, so why should I care? I don't get all this moral crap when it comes to dying and stuff. Would you die by being smothered, or massacred? My answer: don't care, I'm dead either way so why should it matter?
To be honest, I think the things that should be considered when dying or killing are simply these:
1. Cost: Spending millions to die or kill is a waste of money, when a knife can do the same thing and costs very little. Save everyone else's money by doing it cheap.
2. Coolness: Lets face it, there are people who love to see death and gore (me) and they would like to see a cool way for people to die. (This also counts for those heroic deaths). I'd like to see someone die in a fan, rather than the ocean.
3. The benefit of others: Sacrafice is the best way to die, because you're doing it for the greater good, try to do that.
4. Reason: Have a reason, don't be a pussy or a dick, or an areshole, die with nobility.
5. Let people know what to do with your possessions and body after you die, personally I'd give my possessions to the state and body to science or nature.
I think that's all of the reasons, if I think of more, I'll let you know.