I usually look for stories with characters who are in their late teens. If that's not your cup of tea, you might not enjoy these then. A lot of them contains romance and drama though i think I tend to focus on friendships (which often end up in romance or drama anyway).
Here are some of the stories I've read and enjoyed. This is a non-exhaustive list and includes mostly what I just saw as I browsed now.
Compilations/Series or Preferred Authors:
All of Dom Luka's Stories - Enough said. I'd recommend starting with Dessert Dropping.
Most of dkstories's Stories - Mostly Sci-Fi.
Cole Parker's Stories - I've only read Tim and Duck Duck Goose and they were ok.
Josh Aterovis' Stories - This one's a Mystery writer. I generally don't like mystery stories but his were okay. All his stories can be found in nifty. Start with Bleeding Hearts.
All of Grasshopper's Stories - He has moving stories about the disability and discrimination. Start with Just Hit Send.
What We Are (and the sequel) - An accident involving a hockey puck and a young man in a hurry to get to swim practice results in an unlikely friendship between four boys. (One of the first few stories I've read and one I wished was continued. Or, I wish the author wrote other stories too.)
William Carter Saga - Note, some of the characters will make more sense if you read the first two books. The link here is the third book in the series and the one I enjoyed the most. You might be able to read it as a stand alone as the main character changes in the third book.
Individual Stories:
Christopher's Story - Set in Illinois, the teenager survives divorce and abuse to become a gifted artist.
Shane - Shane is a lonely, extremely poor 15 year old. He is abused by his family, and picked on at school. Follow him on his journey from the depths of despair to finding a loving home and boyfriend .
Someday Out of the Blue - Connor Matthews, a shy boy who comes from an abusive family is accidentally hit in the head by a lacrosse ball one day, which leads him to meet Ryan, an attractive redhead, and his younger brother, Toby. Connor gradually learns to come out of his shell, but not without some traumatic experiences along the way.
Educating Alex- I don't quite remember why but I think i liked this. lol
Laika - Brandon is a quiet Sophomore who just wants to keep to himself. When he starts getting signals from both a preacher's son and a punk-rocker, his life becomes something he never imagined. What follows is a funny and touching story about a confused boy finding his way through life.(Loved the character development though the ending leaves something more to be desired.)
Leaves and Lunatics - by EleCivil
Pocketful of Stars - About a kid figuring out how to deal with his homosexuality.
You might like to try A Special Place by Sequoyah. I didn't get to finish it. It felt like it dragged on too long at the end. But the vast majority of the story was quite captivating.
You might also want to check out the Best of Nifty and the Net if you want to browse through their stories.