What are you planning for your retirement? Are you excited about your plans? If you are thinking that you can't wait to sleep as long as you want and do whatever you please, you might want to reconsider your options.
There is nothing wrong with looking forward to freedom from the alarm, but that will quickly become quite boring if when you finally get up, you have nothing much to do but get a new tube of toothpaste.
Retirement can be something really special if you find a new and exciting activity to pursue.