I'm 51, as of November and like others, wish that I had taken up guitar, seriously, sooner. I had attempted but didn't have the patience to stick with it. I guess that comes to some of us with age!
I'm a newbie to the guitar world - can't understand why it took me so long to buckle down and get going with it. Santa brought me a Godin Exit 22 for Christmas and then I decided I needed another (a bit of GAS, I guess!) for taking out to lessons, cottage and just messing around with (saving my new guitar from the hell) and bought a used Godin Freeway Classic. I'm having a ball and some day I will be able to actually play!