According to Blake Snyder, who wrote SAVE THE CAT, you want your "audience" (i.e. readers) to laugh, to cry, to be frustrated, to be afraid, to feel regret and anger and ultimately, breathtaking TRIUMPH! *fist pump*
"We go to a movie (or read a book) to experience a 'dream state' where life and its attendant emotions are recreated in a safe environment." SPOT ON!
And if you don't believe him, he points to the comedy (yes, a comedy), Something About Mary, that works the audience emotionally. There are scenes of great fear, lust and intense longing in that movie. And it's a COMEDY!
So if you feel like your story is reading flat emotionally, he recommends fleshing out scenes using all the colors in the palette. Make a list of emotions and then think about which ones readers might experience in your book. Ask yourself: In what scene do I have frustration? How about fear, longing, etc. ?
By adding different emotional scenes to your book, your readers will have a much more rewarding experience, no?
***To Mr. Blake's point: one of my CP's said I was like a "therapist" for her characters, because I constantly asked how they were "feeling" in my side notes (hee hee, that cracked me up!).
And now, in my second read through of her book? She has blown me away. I'm much more emotionally invested in her characters because I feel deeply for them!