Prides: As others have said, it mostly centers around the royal family and usually has the same story (especially with TLK rps): Cubs are naughty and bored, they wander off, they almost get killed and the parents come to the rescue while the non-royals sit around roleplaying to themselves.
Packs: Can't say much, I've only been in one pack that was a pretty cool pack. It went inactive, but it was active for a while.
Clans: Don't get me started on clans. I haven't even read Warriors and don't plan to due to these unrealistic clans and characters.... *Shudders*