Well, bless my soul! There are people here older than me!
But, as someone pointed out quite rightly, it's not the years, it's the mileage that counts; what your birth certificate says is far less important than what your heart says.
I'm 52, but I started out kinda young, at just 11. In 1964, I swiped (the politically correct words was 'borrowed') my dad's open reel Uher tape deck. By 1970, age 17, I had my own system, from proceeds I gathered giving private lessons. By 1974, I was merrily soldering away, improving what those dummies, headed by Willi Studer, messed up in my ReVox integrated amp.

2N3055? Even if by RCA? You have to be kidding, hombre, no way!
By 1980, I got cheeky enough to start designing ...
By 1986, my wife gave up on me ...
By 1995, everybody had their own system in their own room - wife in hers, son in his, I in mine ...
By 2005, I am a hoplessly lost case, I have music coming out of my ears, and it's come to the point where I have problems with silence ...
But man - it sure is
FUN!And I don't mean just the music, oh no - I also mean, just as much, the people this hobby has enabled or stimulated me to meet.
And it's getting better by the day! Despite compression, iPods, ATRAC Version 1,987,561,987,765, despite cheap and horrible Chinese speakers, despite (or in spite?) of HT, despite inflation, ...
Upon my soul, I cannot imagine a hobby more fun than this. It beats even tuning my cars.
Cheers,
DVV