“When I die, I want to go peacefully like my Grandfather did, in his sleep – not screaming, like the passengers in his car”
(Author Unknown)
I was considering posting that.
Personally, I’d say: “surprise me.”
Seriously, I’m not good at the anticipation thing.
Although being, say, torn apart by velociraptors might make the news.
Bullet through the head. Ooh, I know. A .50 cal sniper rifle.
Smothered to death by Dolly Parton.
This is probably the most painless way to die possible. If the air in my room was surreptitiously replaced with an inert gas, I’d simply pass out without warning and not wake up.
The only other contender is being instananeously vaporized by a nuclear explosion.
Just curious, but why does it take God 3 seconds to do all of this stuff? Is this a reference I’m not familiar with? Because there’s nothing in the OP that says that God tells me I have to choose a way to die at that moment. According to the OP, He tells me to choose my fate.
My fate has been pre-chosen and I have no idea what it is. So, I choose the fate of waiting for own fate to unravel.
I know this is boring but I’d like to die in my sleep. I’d like to go to bed one night feeling heavy-tired and enjoy those few abstract moments between states and then not wake up.
Failing that I want immediately fatal sudden trauma.
The main thing is that I don’t want to feel it and I don’t want time to think about it. Snuff the brief flame and be quick about it 
I’ve heard that people, who have died of a heroin overdose, say it’s a pretty good way to go; once they’ve been brought back.
Well, first, I don’t want to know that I’m going to die, so God would have to make with the omnipotence and erase that from my brain. Then I’d prefer die in my sleep–again without ever knowing what happened.
But I wouldn’t want my husband to have to wake up next to my dead body the next morning…so I suppose I’d prefer to die during a nap in the sun on a weekend afternoon.
I’d ask him if He could wait just a while, until I’d made that one big pitch, “one for the angels” Then I’d go.
Not to sound gay or anything, but if one of the options effectively allows me to have sex with God I must say i’m tempted. Wait, temptation bad. AAAAAAAAAARG!
Very quietly, with no fuss, my heart stops and I fall over. That’s it.
Set the controls for the heart of the sun, I’d tell Him - teleportation to the center of a star would be pretty cool.
And then make it go nova, so I can take all these other bastards with me.
I’d like to have a huge matter-antimatter bomb explode in my chest. If I go, I’m taking y’all with me!
But seriously now, I’d probably say “My time for what?” God would reply “Time to stop jerkin’ off inside your grandfather clock!” and we’d all have a good laugh.
My favorite, from bash.org.
I’d taunt your God into smiting me. Failing that I’d choose an overdose on sleeping pills.
I’m boring. I’d like to live to old age and fall asleep next to my husband. And not wake up.
I’m not undermining his reaction, I just don’t think that this is very likely. But really, how much better could it be than embracing someone you love while you’re asleep?
“Your time has come” usually implies this is the big one, now.
All by itself, sure. But in context, I read that as “the time has come for you to choose your fate.” If the OP meant for it to read, “the time has come for you to die, choose how,” that’s fine.
I’m still waiting for an answer on the three second shot clock though, 'cause that’s just making no sense to me.