Check out today's list.
Opening lines should;
Get the reader hooked.
Establish the general tone of the novel.
Compel the reader to read on.
Something should be happening or just about to happen.
If you want to get your work published remember that your first reader will be an editor or agent. People who have a stack of manuscripts and are just looking for a reason to pick up the next manuscript. Make your first impression count.
One other thing! I recently went to an author talk by Sarah Lean. She recommends you know your first line. When she handed her manuscript to a possible agent it was the only question she was asked. Her mind went blank for a moment but then the writing angels stepped in and she remembered her all important first line.