You should know that the difference between retail World of Warcraft and private World of Warcraft servers if you've ever played one of them. We would say that there are definitely major advantages to the both of them, but we strongly recommend that if you want to play World of Warcraft and have fun with it, pay the extra money and play Blizzard servers.
   On the one hand, private servers have so many problems that it is not even worth it. Even as a private server owner, having the private server around got extremely boring. Private servers are filled with bugs. You're going to have a hard time doing many of the things required on the game without the help of a game moderator, because they're required to fix the bugs. What's really nice is when the game masters aren't even able to fix the problems that people are facing in the private servers.
   On the other hand, private servers have terrible stability. Private servers are much less likely to stay running these days, as Blizzard is able to shut down the most popular ones quite easily. Also, the servers are down all the time anyways. It's horrible to try and play and just keep getting kicked off all day long. Not to speak of that the latency you're going to face on private servers is horrible in most cases.
   For the most part, you are required to donate so as to get really powerful in private servers. You are going to severely underpowered to all other players that made a decision to donate money to become really over powered if you do not donate.
   We'll have to admit that private servers are fun for Player versus Player. But the Player versus Player on Player versus Player Blizzard servers is even better. You might think that you like being instant 80 and you probably do but when you have to work for it on the Blizzard servers, the game is much more enjoyable. You'll never really realize how much fun it is leveling up and running instances with friends.
   You might think that just because you play on a private server under a "blizzlike" condition, which means that you're playing exactly how Blizzard servers are and therefore why should you change to Blizzard servers and play there? There are all of the reasons we have already listed. The "blizzlike" conditions are nothing like what you think. In many private servers, instances are all bugged, and in many more, you're not even going to be able to do more than half of the quests that you need to complete.
   For a mere 50 cents a day, you are going to get the best quality World of Warcraft you can get. Not only will you not have any bugs to face all the time but won't have to worry about the server going down all the time or your character being wiped. You will have a great connection speed and will always be able to find groups with other people.