I love writing angsty slash where characters overcome terrible things to find their happiness. I love happy endings. Science fiction and fantasy are my favorites, but I will work on other areas if I get an idea I like.
I find a lot of enjoyment in details of a world and characters, things that make it interesting and real to me. How does this thing affect that thing? If this psychic ability, mythological creature, sci fi thingamajig existed, how would it integrate into the real world? What might be the unexpected effects? I love that stuff.
I also enjoy how characters can grow and change with experiences and how their quirks and flaws affect their behavior and interaction with others.