A lot of existential writing is like that. Very bland, normal life stuff. The First Man is very different to the Outsider though, its quite colorful and passionate and it reads a little like a travel novel with its descriptions of life in Algeria. It was his last book.
Probably Hemingway or Ayn Rand. Or maybe Ray Bradbury, or Isaac Asimov. Hmm I don't think picking a favorite author will ever happen for me.