I'd love to live forever, but either as spirit or if human then with star trek technology and infinite other planets to live in and explore. This planet is small after you have traveled all over.
O and another response to OP's post, so do you wish you were dead right now? Are you upset that the person you were when you were 3 years old, 6 years old, 10, 15, 20, etc, are all long gone?
We also only use a fraction of our brain, there is a man who has remembered EVERY day of his life and if given any day he can tell you what occured that day. (forgot the name but I'm sure google can find it quickly if you are interested).