I love Young Adult fiction, I find it extremely satisfying and recently it's all I've felt like reading. So, here in no particular order, is a list of favorites:

Protector of the Small series by Tamora Pierce
Daughter of Smoke and Bone by Laini Taylor
The Summer I Turned Pretty by Jenny Han
The Truth About Forever by Sarah Dessen
The Harry Potter series by J.K. Rowling
The Hunger Games by Suzanne Collins
The Blue Sword by Robin McKinley
Someone Like You by Sarah Dessen
Ella Enchanted by Carson Levine
Fire by Kristin Cashore
This Lullaby by Sarah Dessen
Dragon's Blood by Jane Yolen
The Westing Game by Ellen Raskin
Sloppy Firsts by Megan McCafferty
Second Helpings by Megan McCafferty
A Wrinkle in Time by Madeleine L'Engle
Island of the Blue Dolphins by Scott O'Dell
The Hero and the Crown by Robin McKinley
The Unbecoming of Mara Dyer by Michelle Hodkin