I prefer not to think about such things.. :S

1 month

Wow, that's a grim thought... If I have to answer, I'd say around 3 months. I don't want to give false hope to my close ones and it's better for them to move on in case that happens...

At that point, I put it all on my loved ones. I would like them to choose knowing the circumstances, just as I won't have any funeral requests, since it is more for the comfort of the living than myself. I'm fine with dumping me in a big hole in the ground and calling it quits.

Apart from being kept on it during operation and recovery - not single minute. I think that keeping someone on life support for few months (and when it is clear that someone won't recover) is selfish - noone should be forced to lie somewhere as literally living corpse.

forever

A few month I guess.

Just until they find someone for whom my internal organs will help, I guess

no idea :P

As long as my loved ones feel is necessary or worth their commitment.

I assume you mean when there's little chance for recovery. In that case get me off life support right away.

If I'm on life support, pull the plug.

If i understand the question correctly, that is, 0 chance of recovery, 0 seconds.
I wouldn't want to be braindead and plugged to a machine.

As long as it takes for all my organs to be transplanted.

Honestly, my answer is "for never". If I had to be on life support, just let me go.

I need a more specific description of what state I'm in. Life is awesome and as long as I can keep experiencing things then I don't want it to end.

Depends on what kind of state I'm in. Already elderly? Yeah, thanks, lived enough. Maybe a week or two. My organs could prove to be useful to others, possibly saving multiple people if there's a match.

If there's a chance of recovery, some months. If not, not a single second.

One of my biggest fears in life is that I'd be in a vegetative state, unable to move or respond, but that I'd actually be fully conscious the whole time.

If I'm in that state, keep me alive long enough to find recipients for my organs, then pull the plug/put a pillow over my face/whatever.

That being said, I completely understand people who don't want to let go of their loved ones, and who still hold out hope that they'll turn the corner. Or people who want to be kept alive and have every possible procedure to try to aid in their recovery. Sometimes it works, sometimes it doesn't.

It's a very personal decision and I can't judge anyone for deciding to go one way or the other.

I'd want not to use those at all, I'd be happy to be gone

Forever. Yes.

Hopefully long enough for my best friends to clean my house and get rid of anything embarrassing before my parents come.

View attached image.

not too long. when it's over it's over

not at all

Depends if there is hope of full recovery. Otherwise enough time to get some usable parts from me before I get incinerated.