I'd like to be immortal, I could watch people suffer for eternity.would depend on what kind of immortality.
if its simple ageless, e.g. infinite lifespan, then i'd have something to consider with regards to certain things.
things like growth, hunger, disease, injury, etc. can be a major factor whether being immortal would be enjoyable.
imagine having an infinite lifespan, yet be a decrepit senile old sack of bones, with a terminal case of incurable but non-lethal disease.
Immortality is a state of body in which you are literally immortal, but not invincible, which by default makes you Immune to Natural death status.
Natural Death Status is a state of body where death is caused by being killed, dying of age, hunger, disease or stupidity and source for YouTube laughs despite being dead where people still laugh at you, cuz you died of stupidity.
Immortality does not allow hunger, disease aging or getting killed options to die. You can get stabbed a few hundred times, yet you will still be alive.
The only way an immortal being would be killed is using the Konami code. Hunger would likely get you in great pains, so would diseases and painful (literally experiences) would be really annoying, but you would still be very well alive.
We are talking Immortality, not "Magically not aging but still dying due to flu" unknown state.
Immortality is immortality, people age but it doesn't show, people get sick but don't die, people get hungry but don't die, people get stabbed but not die, people get shot but not die, 300KG american falls on you but you don't die (although after that I would very much like to die).
When you are immortal, you can't die, literally the reverse Shirou Terminology of people dying.