Some fanfics are good. Some fanfics are bad. And some fanfics are written so well they are fanfic in name (and copyright law) only. Titan Legends falls into that category. The plot... is basically taking every stupid, Sueish 'omg my character joins the titans!' fanfic and doing it right. The characters can drift into Sueishness, but are easily redeemed by good writing and some truly fascinating plot twists. Your Mileage May Vary, but for most this is a truly enjoyable series. And slightly addictive... It can be found here. There's also a WMG page and a CMOA page.