I think one reason I feel so much younger than I am and feel so free is I have no grandchildren. My older working on her Master's and getting divorced - may never have kids. My younger one engaged and plans to have children within five years so my honeymoon almost over.
Now whether grandbabies mek yuh feel old because they remind you of your age or if because they just tire you out, that's another question entirely! I have at least a couple years before I find out...