I think a new paint color on the walls and built-ins would really freshen up this room!!
The kitchen certainly has potential. While it doesn't NEED anything done to it, I'd opt for installing a subway tile backsplash, changing out the sink for a single bowl, new window shade, maybe new hardware, and some sort of pendant light:
The backyard is nice. I've always been more of a patio girl, but at least the deck is new!
Love the doors!
Rip out the deck and install pavers et voila:
*Note to husband: this is an example of me being imaginative. No need to guard your wallet; I'm only dreaming!!! :)