I enjoy imminst.org and Kurzweil's info, and would love to see what life is like in a few hundred years, or even in a few decades, while maintaining a healthy and energetic body (if a body is necessary/optimal for experience). Unless/until life can somehow be backed up and rebooted in case of an accidental death, one would still only live until a fatal accident occurs.
If I could realistically expect to live several hundred years instead of 80-90, I'd be a little more careful about how I live. Already I take some care to maximize my health. I could continue climbing, but safety ropes may come into use. Skydiving and hang gliding would still be fine, but I may not try BASE jumping, at least not too often
Sports cars would also still be fine, but not motorcycles (again, not too often at least). In other words I'd be taking precautions that I otherwise would only concern myself with if I had kids.
I don't see a longer life getting boring as long as I still have energy. Modern culture is produced by people who rarely live much more than 80 years. A culture produced by people living for centuries if not millenia would be significantly different.