Well, if I were going to be threatened with death, I'd be hopping around to get away, so it isn't like I'm unhappy being alive here, I do have people I care dearly about and who make the ability to know them a wonderful experience.
I've had lucid dreams a few times, usually once I realize I'm dreaming I get so excited I have become lucid inside a dream that I will wake up within a few short moments, but when I get excited about believing I am living in a simulation, that doesn't happen, of course, so I don't think I am dreaming, what ever it is, I am locked into it. I have experienced false awakening, where I am dreaming I woke up from a dream, that is a weird experience to go through when you really wake up.
I agree, whether a simulation or not, it is so sophisticated with the ability to be self aware, even if we ourselves are simulated it is so detailed it might as well be real. I would bet such a simulation would be based off of their reality anyway, duplicating everything they could to make it follow their own, what else could you do? You would be forced to model it after something you know. I can take this a step further, even if a simulation this reality would be a part of their reality in the same way our computers are a part of our reality, they might run simulation games, but they are running on real hardware within a larger reality and in the end, not separate from it, just have the illusion of being so.
For all we know this is an education program aliens use to teach their children about life, the program might be called LIFE, the administrator named god, but not a deity, unless you just consider them that for being so smart to program and run the system we are temporarily embedded into. For that matter, we could be reinserted into other lives without a break, one after the other and then when the training is done, the memory partitions pulled out, then able to remember each of them in full detail.
OMG, I just heard someone say "shut up about that", but no one is here, creepy.