When the guidelines first hit and we didn't know if existing fan films were going to be pulled, I began watching through Trek fan films. After Continues, New Voyages, Horizon, Of Gods and Men, Renegades, Exeter and the rest, I came to one series I'd avoided for years due to it's fuzzy greenscreen and homemade uniforms - Hidden Frontier. It started off very weak, but it came in easily digestible 30-minute episodes and so I stuck with it. Soon I was hooked. The acting and writing improved more and more. And it goes on forever - 50ish main episodes, spin-off series', an Intrepid crossover and audios.
Definitely worth a look.
Definitely worth a look.