
I just know that in heaven, we will experience joy and contentment that cannot be explained for eternity. We will not be tired of it because we will be free from our human limits of emotions and suffering and the shear greatness of God’s presence. The unknown is very scary but I personally have more comfort in knowing good things lie ahead. Even if that means eternity.
Physical body just means something that looks like your physical body. Not necessarily a body that can die. Option 4 is pretty much the concept that heaven isn’t a realm like ours and doesn’t have any sort of “physical” manifestation at all, just your consciousness in a state of pure bliss in eternity. No experiences at all.
It doesn't mean you'll be given a strangers body or anything like that, it'll be your own just "renewed". Scientifically I believe this to mean a body that is not affected by cellular degeneration and mutation. But obviously I don't know for sure. Additionally, this doesn't change who you are, your soul and personality aren't dependent on your physical body's appearance or legal name so it's illogical to assume you would be "stripped of your identity".
This might be worldly, but I like my name. I don’t want it to change even if a deity tells me to. It’s probably symbolic or something but I dunno. I am who I am, and if I’m destined for heaven then I’ll go there. But I’d like to keep my identity, and my name is part of that.