Lost 60 pounds and dont recognize myself anymore

Started running two years ago just to feel less exhausted. Now I do marathons. Before I couldn't play tag with my kids without getting winded. Now they can barely keep up with me. The weight just came off over time. What I miss is the ease of it all, eating whatever, not planning workouts. But what I gained is so much more. I feel like I got extra years back. My dad had a heart attack at my age and I was terrified that was going to be me. Now I feel like I dodged something.