Yep, it's a twofer, given that I forgot again yesterday... (am having a totally braindead week this week...)
Day 13 – A genre novel you’ve read more than five times.
Stephen King. My ultimate comfort reading. IT probably takes the prize as most read as I'm on my third (very ratty) copy, but The Stand is another favourite (at least, up until it gets all over religious towards the end. Apocalypse hijinx!). Also various of the early short story collections. And bonus points because once you read the Dark Tower books you keep seeing all the connections between all the rest, which makes you go back and re-read again. Which is fun.
A similar thing happens with Charles De Lint. The Newford books have an excellent criss-crossing of characters so you'll get a walk on in one book becoming the lead in another. I think, on reflection, that Someplace to be Flying (crow girls!) would be one of my most read. Also Spiritwalk (my first De Lint!), and, again, like with King, the short story collections get more rereading than the novels do.
There is also the legendary Lord of the Rings. It has to be done at least once a year (although I don't re-read the Hobbit quite as much and have only touched the Silmarillion once.) I find I skip different bits on each reading, though. Currently, I can not being doing with the interminable Frodo angsting (the movies have ruined me...) and so I tend to give more attention to the rest of the Fellowship shenanigans; while in earlier times it was the other way around.
And as I tend to re-read collections and anthologies more than novels, Esther Friesner's Chicks in Chainmail anthologies are a definite favourite. Comic fantasy full of excellent action heroines - what's not to love?
Day 14 – Favourite book trailer from a genre novel.
No idea. Have to confess to not completely getting the big deal with book trailers - I get sold on books by either reading the reviews of and/or articles/interviews by the author, or listening to the author at a convention. Actually, especially that last one. Authors at conventions tend to make me immediately pick up at least one of their books, even if I'd only vaguely heard of them before and never gotten around to searching out titles. Especially if they give good panel.