All (but one!) of the communities I've interacted/engaged with on this server have been great communities. Because Haense raised me and taught me about the server, and all the work I've put into their military, that's the reason they're my personal favorite. The fact that they evaluate those who join them based on merit, and their inclusiveness into their active, diverse and vibrant community is an additional reason. I've made OOC friends for life through Haense, and I will forever be grateful for that.
As for the other communities, I've had various positive experiences. The Orcs gave me great RP as new player, the Elves have generally been kind folk, I had a great time in a player-made storylines in Talon's Grotto. LOTC is a storyline, and in that story, I've met a ton of great OOC people.
Haense, Haense is my final answer.