As a writer, you have to first of all write what you want to. Listen to advice, by all means, but don't get bogged down in it.
Other quotes by Joe Abercrombie
I got into reading a lot of noir and a lot of thrillers as well, and I really admired the plotting about those and the way that they can surprise you. And obviously to surprise people and to have twists in the tale, you have to plan quite carefully.
I think the further away you get from completing a book, the more responses you see to it from readers, the more your own tastes and opinions shift and the more you start to see things you could have written differently in the detail, or done differently on the broader scale of plot and character.