At least for me.. in my work, age = experiênce and respect.Getting older is good
In life questions, i do mind because i like to feel " good " for my wife but i do not care much about the "contra factors" you mentioned
(not mention it wont take more then 10-20 years until the nano and the plastic C department start using the new technologies that are used in other areas.
You should not worry either
Just live your life as it's suposed to be, to the max. And in case you get lost on the track just remember ; now you can run,play sports and much more! and when you get old.. in case you wont be able to.. What's only thing you are doing now that you will be able to do when you get old? sit your ass in a chair and play games
Just make sure that no matter what you do.. live your life to the max and do the things you like the most! if it's volley just go and play! if it's soccer just go and play too. if you like to walk freely or just like to run why not? take 1h of your day and do it. Dont spend with idiotic things such as getting drunk till you fall down, drugs,arguing,sleeping all day
just live.
At least this is how i think about getting older.
TP_MoonStar.