I think the reason I have so much trouble with "realistic" fiction is because I "know" something of reality and I feel a compulsion to "write what I know".
Problem is, what I know is boring. I'm a young college student, growing up fairly compliant as a child, with no list of sordid childhood romances or any particularly eccentric adults or friends in my life. Plus, because I am so close to the details of my life, they are hard to make special without sounding saccharine and pretentious to my own ears.
I know, one of the skills of a writer is finding the extraordinary in the ordinary, but it's something I have to work on.