Yes, I used to like to also. I still sometimes do and I have such wonderful memories of running. I ran for years until my mid-30s. I now realize, however, that it would further damage my knees and that's just the start of possible problems. I'm 45 now. I can't do what I did at 25, nor do I think that it would be wise.
The key thing, I think, is to listen to your body. Again, I can no longer do all that I did in my 20s and early 30s. I wish I could. Twenty years ago, when my dad was in his early 60s, he and I used to go jogging every morning. One day, we almost tripped over a body on the ground :huh:. Turns out the poor guy had just died, collapsed right there. He used to run every morning, but suffered from high blood pressure. Since my dad had been suffering from it also, I asked him to stop running and he never did again. He now walks, swims and cycles every day. He takes a milder approach and is doing great for someone in his early 80s.