I don't find writing male characters all that difficult. In fact, I quite enjoy it. I imagine what I would want the man to be like if was the woman opposite him in the story, and I build up from there. It's easy to write the bad guys - they aren't meant to be liked.
At first I didn't care for the idea of e-books. I read print books that I can hold and feel and smell. I read maybe 1-2 digital books a year for pleasure. However, I do believe e-books have made reading more accessible to a wider audience. They are generally less expensive and much easier to take with you everywhere. Print books and bookstores haven't suffered like so many thought they would, and that's wonderful. I believe (and hope) that the various book formats continue to make reading an appealing way for people to spend their time. There's an audience for every book format.
I did in the beginning, when I first published under my other pen name, but stopped after a few books. The fact is, no writer will ever be able to please every reader. We might try, but it will never happen. Books are as varied as the people reading them, and everyone has different opinions. Mean reviews can hurt - writers put heart and soul into their writing. Responding to good reviews can be tempting, but I also believe reviews are for readers more than for the authors. Freeing myself from reading reviews keeps my mind centered on the creative process. (also answered on my McKenna Grey page)
Take time for yourself. Enjoy and experience life so you have things to write about. Don't let anyone push you to do more than you're able, and don't push yourself so hard that the creative process suffers. Publishing is a marathon, not a sprint. Set yourself up for long-term success by taking the time to do it right. (also answered on my McKenna Grey page)