Success in the realm of massively multiplayer games is mostly dependant upon two factors, namely disposable time and income. The more free time you have, the more quests you can complete, the more money you earn, the better armor you have, the more experience points you get, the more powerful you become, and so forth and so on. This is nice if you're looking for a long, rewarding gameplay experience, which insinuates that you'll be paying the subscription fee on top of the initial purchase - After all, maintaining a persistent online world isn't cheap.

This isn't so nice, however, if you're reviewing said game, especially when gameplay features are restricted by level. Sure, the first few levels might be really boring, but the game might pick up later on. Alternatively, the game might be really fun at first but could run out of steam about fifteen hours in.