I hadn't started out writing completely from Phinn's point of view. There is also a teenage girl in my WIP, Jess, and in the first incarnation of this novel had her own POV. I'd written alternating chapters from both points of view, in third person. But when I started to rewrite the book, I had to twist around my whole original vision, and I wrote five pages to get into it. And it was first person, all from Phinn's POV. I considered—briefly—still doing the alternate chapter thing using Jess, maybe in first person, maybe third, but abandoned that idea when I merely continued to write from Phinn's POV without even taking a breath.
On the most part, I think I've got it. I've had a friend read the first 100 pages, and she concurred, for the most part, but pointed out a couple of things that she didn't really think Phinn would say, and I agreed and changed it appropriately.
To get a litt

I loved the voice, I loved the relationship Q had with his friends and how he comes to terms with how he feels—and has always felt—about Margo and his perception of her.

Because I loved PAPER TOWNS, I turned to another John Green novel, his first, LOOKING FOR ALASKA. Miles leaves his Florida home and unpopularity behind to attend an exclusive private boarding school in Alabama, where he meets his roommate, Chip, aka The Colonel, and Alaska Young, a wild girl who swings back and forth from fun and flirty to bitchy to sullen to depressed. Miles's fascination with Alaska, his relationship with the Colonel, and his ruminations about his favorite class, Religion, are compelling. I can't say much more about the plot without giving it away, but the book raises interesting questions for the reader as well as for Miles.
Since John Green used to be a teenage boy, I believed in both Q and Miles's characters. They are typical teenage boys, much like Phinn.
I do know that some women writers have had to use initials in their names if they've written books with male protagonists, such as J.A. Jance, who writes the excellent JP Beaumont series, or JK Rowling—not that I have to tell you she writes about Harry Potter. I'm not sure that ploy really works, since we all know they're really women writing about boys, and people read them anyway.
What about you? Does the gender of the author make any difference if that author has created believable characters, whether male or female?