I'll be 64 in October. I retired from my occupation as of 1 July 2009, which gave me LOTSA time to brew. I didn't get started with the obsession, however, until January 2010. Several batches under the belt already, with many more to come!
37, started brewing at 19 for 3 years, stopped for 4, brewed for 4, stopped for 3 and been going somewhat steady for 5 years now. So 12 years experience.