1. discussing important issues for me, i.e., discussing my affairs, etc. Sometimes talking about global problems.
2. discussing global issues that are important to me, and sometimes to the world, i.e., to other people.
3. correct: discussing my affairs, and sometimes global ones, i.e., I don't always feel like doing the latter, especially now, but they are also important to me.
Added 1 minute later
I meant some global issues, not why Sci-Fi is better than Fantasy.