Is immortality desirable?

Over a number of mythological serials one has often heard this blessing "Ayushyaman Bhava" or May you live long. In many movies (of my childhood albeit) one also heard "Tumhe meri umar lag jaye" or may you grow at least as old as me. We also wish people "Jivet Sharada Shatam" or may you live to see 100 winters i.e. live to be 100 years old. These are regarded as blessings.

Personally, I don't know the joy in living that long. At nearly half this age, when one's body is already ravaged by the passage of time to a state where one is prone to either this malady or that (for whatever reason), I don't really see the point in watching it get ravaged further to a point where one is arguably unable to even write some rubbish like this.

Also if one accepts the fact that there are infinitely more sorrows in life than there are joys (and 'round objects' to people who believe that every moment of life is a celebration), why would anybody want to see more and more of such stuff.

Yes I agree that each phase of life has different pleasures but really do I want to see all of them? And how many more phases would there be before the last few phases start repeating. As I write this, I am inexplicably reminded of the Fibonacci series where Fibo(1) = 0 and Fibo(2) = 1. Any other Fibonnacci number n can be generally described as Fibo(n) = Fibo(n-1) + Fibo(n-2). To bring this parallel to the human life cycle there are possibly 3 phases i.e. Childhood, Youth and Parenthood and any future phase is a culmination of the previous two really.

So I do not think I want to be immortal. I would not mind dying right now!