Tell the story that's in your heart, and don't hold back. Write a book the reader will want to melt into.
Writing is a struggle no matter what the genre.
Talent is required, but much of writing is a matter of craft, which develops with time, attention, patience and practice, like playing an instrument or learning to dance.
I've always loved writing emotionally rich, character-driven novels that explore the way people fall in love and deal with life's triumphs and tragedies. I enjoy writing the contemporary and historical books equally, though perhaps 'enjoy' is the wrong word.