I think that the pride/pack needs:
1. good roleplayers
2. Interesting story line
3. A simple ranking system that everybody can understand, it's so annoying when I join a pack/pride with such an advanced and complicated one that I don't get how the roleplay works.
4. I prefer prides and packs that explore their surroundings instead of staying in one territory all the time, and with only 4 - 5 members each in them. With fewer members, it encourages the ability to shape the story and keep the roleplay interesting, and always being on the move helps the trait of adventure into the rp.
5. Allies and Rivals, you'll never know what they'll do next, especially if they're too far away to hear. Because of the lack of communication, you'll start to get really anxious about when your Rival will attack, and will help introduce more story lines into the already great one.
