The scary thing is that some people have all these plans for their retirement, like working on their hobbies, or getting back into something creative. But once you finally get there, you might realize that you've lost whatever you had. Either you forgot how to do everything, or the field has moved on without you, or you lost the passion itself, which is the saddest thing.
I recently experienced some form of that. I just got back into things like music, acting, writing, and filmmaking after a very long hiatus. I was never really that good at anything, but now I feel very rusty. And everything I do is bad. And somehow I don't feel quite as creative as I used to be. But I'm going to keep working on it, because I feel like I need to have a change from software development. But if you asked me what I would do if I could retire right now and not have to worry about money, then it would be this, as well as working on electronics and software projects, maybe learning how to weld or do woodworking. There's a lot of fun things to do, and cool things to make. I guess that's not for everyone, though.
Even if you decide to pursue a fulfilling career where you enjoy everything about your job, don't let that be the only thing in your life. The world is much bigger than that.