I havent tried Requiem so I can't say anything about that.
But i like RF *cough* server cause i play on one and its pretty fun. The retail game has so much grind, that on *cough* servers u can actually learn the game at a decent speed without ever playing retail lol.
Anyways i prolly only love it cause im a Phantom Shadow and i set traps all around base's and watch ppl blow up like ******s, its fun. And i kno the community pretty well.