There’s a part in George R. R. Martin’s Game of Thrones series, where Tyrion Lannister is faced down by an irate hillman brandishing a sword in his face, asking him how he wants to die.
“In bed, at 80, with a whore’s mouth around my cock.”
The idea of death doesn’t bother me , but like Boscibo, I don’t like the idea of being looked at after I’m dead. So ideally I’d go with a sudden burst aneurysm while I’m sitting in a cave somewhere. My body could lie there undisturbed (or gnawed on - I don’t mind that). However, I want to be an organ donor, so I guess it’s better if I’m in a hospital so they can take what they can use. I have told my family that under no circumstances would I like an open casket viewing. If I can’t look back I don’t want anyone looking at me.
StG
Inside of my fifth wife.
Jumping off the Golden gate bridge:
By the North tower
Facing the ocean
simply everybody jumps from the south tower, facing the city 
Once long ago I nearly drowned.
I struggled to survive, never giving up, never panicking. Anyway, the point I’m trying to make is that it wasn’t so nice that I wanted to “finish the job”, but it really wasn’t that bad.
As I struggled to get out of a little unfortunate situation (so I thought) a new realization crept into my consciousness;
“You’re drowning Forbin. You’re going to die in approximately one minute.”
I still didn’t panic, but I didn’t like this new development one bit.
To make a long story short, I was able to swim away and save myself.
I’ve often thought about it, and sometimes I flatter myself that I can (and did) face death without fear. When I reflect on it in more depth though, I am not so nonchalant. In the occasional close call, I must confess I’m a little scared.
The fear of death by drowning is in the death part, not the drowning part.
You will cease to exist.
No more choices.
No more good days, or bad ones either. No more girlfriends. No more projects. Nothing.
Given a choice, I’d take a rifle bullet to the head. Someone far away targets me, squeezes off a round, and in a flash, my existence ends. No need to experience that fateful moment of knowing it’s all over.
(Not intended in any way to tie in to current news events. My regrets for any similarities.)
Something totally unpredictable
About five years ago, I came VERY close to dying of a blood infection, and since then have decided that if I got to pick, that would be my choice. I felt pretty sick (fever of 104.7 will do that to you), but there wasn’t any pain, and I slept a lot, and if I just hadn’t woken up one of those times I fell asleep, well that wouldn’t have been so bad.
I’d want to die either doing something I love doing or die in an exciting way, such as a skydiving/bungee jumping accident or while saving someone else or even a terrible roller coaster accident is fine by me.
Go out with a bang, that’s me alright.
Though dying in bed being held by a loved one after leading a great life, accomplishing everything you wanted to and living long, with Orbital’s Halycon & on & on’s first 2 minutes playing softly in the background doesn’t sound bad either.
Do many people die by more than one way?
KneadToKnow, no every one dies the same way, if you want to be perfectly literal about it: heart failure 
The end of a long day, filled with wonderful food, good wine, many laughs and songs. Having spent time with my family, having held my daughter close and hearing her say “Daddy, I love you,” having made love to my SO.
Contented, happy, feeling at peace with the world and myself. I go to sleep and my heart stops beating in the night.
The end (or, to my way of thinking, a new beginning)
As I’d hate to leave a mess for anyone to clean up and I don’t think I have anything anyone would want AND I plan on being cremated, my perfect way of leaving this planet would be instantaneously incinerated to a fine ash and then blown away by a strong wind. Me and all my junk. I guess I’d need a deadman’s switch to notify the next of kin.
Otherwise, soundly in my sleep is fine.
Put me down for another who’d like to die usefully. I can’t remember which school shooting it was when the news was reporting a teacher who died blocking a student from the shooter. That’d be my choice.
I’d like to be incinerated in the heat death of the universe (or whatever that expression is) at the end of time, when every bit of matter is extinguished in a gnab gib…
I got way too much shit I wanna do to have time for anything earlier than that. 
I want to spontaneously combust!
Surrounded by friends
who all have marshmallows
I’d like to experience that final freefall without the bungee. Perhaps, orgasming my way to death, but that wouldn’t be that interesting : been there, done that - I’d rather do the whole " sent into a black hole or to Mars" thing. I’d know/experience something no one else has even come close to.
Vampire bite. You know, so I could come back?
What?? That’s a cop-out? Meh.
Fine. I’d like to die by falling from a great height. You know, if I had to die someway.
Way to die? On my sleep, like my grand-aunt died at 92…went to sleep and never woke up. And she lived next to her daughter and granddaughters, so in a way she died surrounded by her loved ones.
Of course, the idea of dying doing something heroic is also interesting. Like someone else said, at least that was worth it…
Well, since the OP forbade suicide, which would be my preferred method of shuffling into eternity – I’m sort of a control freak – I guess I’d choose dying by some long-term and relatively painless disease. I would want time to make peace with everyone before I go and die with a clear conscience.
To misquote someone who I can’t remember in the first place I want to be executed by lethal injection at the age of 107 for being found guilty of six counts of polygamy while my 19 year old wives cry their eyes out.