I would want to be immortal because you wouldn't have to live with the thought that you will have to end at some point in your life. Being immortal would allow you to live with life comfortably and know that you don't have to live in fear.
If you live immortal you would be able to do anything you want after that life will get boring because there is not excitement. You have experienced everything in life and there is nothing to look forward too.
Immortally wouldn't be considered boring and nothing to look forward too because when you enjoy something you wouldn't look at it as if it is boring you. According to the text it states " Now imagine that an unending life contains some activity which one finds "endlessly fascinating", it surely does not follow from the fact that an unending life contains an endlessly fascinating activity that the activity must be endlessly fascinating in the sense of infinite extensibility". this quote supports why if you find something to be so good that you wouldn't want it to end it would not become boring.
Everything in life once you do it a couple of times its never as special as the first. Being immortal would bring depression because after you have seen everything you will not be able to relate with people who are immortal like you. What the non immortal's experienced you have already experienced. You will have no one else to go through life with you because you are unlike the non immortal's.
In a ever changing world there will always be more opportunities to have new experiences. With being immortal you meet new people granting the opportunities for new memories. With the world constantly changing there will always be new things to look forward to in life. One can set new goals and being immortal they can continue their legacy. I would want to be immortal to be able to experience these things.
How much can life one person live? Immortality is bad because you will always have to deal with world behaviors such as loss, heartbreak, and pain. Being immortal does not mean you are exempt from keeping up with life. Being immortal will just leave you will nothing to look forward to because you have done everything in life that you wanted to do and life will have no more meaning.