I wouldn't take any of those days back, some great memories were made then, and are played in my mind over and over again. But we all have certain obligations that we are commited to and they should never be blown off, for any reason. I'm talking about taking those days back.
The key words in your post are, "when I could". They were never in my vocabulary, I just went.
The addiction was/is strong, but now the walks are chosen more carefully and hopefully more productive. The thrill never goes away for me.