At times it's great, and at others it's a drag. No people equals no fun.

User Rating: 7 | Warhammer Online: Age of Reckoning PC
Let me start off by saying that the fun is directly proportional to the amount of players in game. At peak times it's great because you can get into RvR senarios to break up the PVE boredom. If you happen to play during off hours then you'll likely be bored to tears. Senarios just don't queue up so you'll be forced to PVE all the time. And without doing the senarios you won't get renown so you won't be able to buy ANYTHING from a vendor. And PQs without a group is super tedious. Sure, the rewards are nice but there's no chance of beating the stage 3 boss alone unless you are a much higher level. And by then the reward probably isn't worth it.

Another thing that bugs me is that the world seems empty of other players. I may run into a few others but it certainly doesn't feel "massively multiplayer". Compund that with a lack of global chat and you can't even have a conversation with other players. So the world really DOES seem empty. At least with other games you knew other people were playing and could socialize easier.

So, either make sure you play at peak times or pick a high pop server.