Writing, KSP (why else am I here?), Spaceflight (crewed and robotic), Astrobiology and the search for habitable exoplanets, Interplanetary travel and colonization, Interstellar travel, and watching or reading plenty of science fiction and fantasy.
I'm back. And I got a bunch of books that I haven't read.
Surely you're joking Mr. Feynman!
Sky people (the 1st one)
Last 3 books in the Worldwar series (then I have the last 4 overall after this)
And the Foundation trilogy