With the accessibility of books in digital form, I think the joys of browsing a library or bookstore for hours are becoming a thing of the past. To me, though, nothing compares to searching the shelves for a book that calls to me.
All of my books thus far have included real life elements. My first book is largely my own story with fictional elements, but there are so many parts that happened in real life. In my second book, which is an extended epilogue of the first, contains a lot of inspiration from my daughters and two dogs. Every book has a part of me, but some are more subtle than others.
Occasionally. I find it usually does more harm than good to my creative process if I fuss over reviews. When I do take the time to look, good ones do help me keep going if I feel defeated. I've been fortunate not to receive any "bad" reviews, but I know they'll come eventually. I just remind myself that even the most successful books and authors of all time can't please everyone. If someone doesn't like my books, they aren't my readers, and that's okay.
Self doubt. Most authors will tell you self doubt is part of the process.
We want our work to have an impact on people. Either to educate or entertain. I spend an excessive amount of time questioning whether the words on each page are accomplishing either of those things.
Don't water yourself down for anyone. Don't be afraid to stand out and do something different. Embrace every ounce of creativity you possess and don't try to blend in.
I've spent many-a-night writing through tears. My advice is to embrace it. If you're feeling your characters so strongly their emotions become your own, it will reflect in your story.