I think you can't be a writer unless you're a reader too. It may be that you read less right now, but at some point I think all writers have been avid readers. It's how we learn. Just think: Jane Austen never read a How to Write a Novel book, but she still managed to write perfectly structured novels because she'd been a reader first.
You have to read. Reading is the breathing in, writing the breathing out. I don't think it matters much what you read, but I'd suggest that your favourite genre is where you should be writing. You'll have unconsciously absorbed the way the stories are told, the conventions and how some writers break them with success - or otherwise. And unless you understand what the reading experience is like, how can you write it for anyone else?
Reading, reading, reading. It's the greatest How to Write guide there is.