It seems like every MMORPG and most games have some sort of unlockable achievements. It surprised me a little that World of Warcraft would impliment a system like this. It seems that all the things players have done for four years to get to the end-game now has a graphic associated with it and earns you points. These achievement points are fairly worthless, and serve as a reminder of which nerd has the most time on their hands.
Not all of WoW's achievements are pointless. Some are fun, such as the PVP battleground ones, requiring you to beat every battleground X number of times, or the ones that require you to collect a series of rare pets or gain a reputation with each faction. These are all things that someone may not do just to get to max level and begin raiding, and therefore are worth extra notice.
It is not, however, worth noting that a character managed to reach lvl 10...or lvl 20, 30, 40, etc. If they are lvl 80 I can pretty much assume that they've played through all the levels to get there (unless there's some magic auto-leveller machine that I don't know about, even then you'd probably still get the achievements).
My rant about this is primarily about both the arbitrary-ness of these achievements and also the fact that they have no purpose except as e-peen competitions. An achievement should mean something, and you should be awarded one for breathing (or reaching lvl 10, I mean, that's about a 2 hour commitment at best, and that's if you spend time dancing naked on mailboxes and go get lunch without logging out). Make the achievements something slightly difficult. The exploration ones are a good example, as are the pet collections. These are things that might actually take a player a little while to complete, which isn't the whole point of achievements to give players something to do until you push out the next patch/expansion pack?
The second purpose that achievements should have is to reward players. Remember the good old days when you could earn ranks by grinding out a pointless amount of hours in the battlegrounds? Or when you could earn a title by becoming exhaulted with the different battleground factions? Rewards don't have to be items, but they very well could be. It isn't hard to make something that looks awesome but has little or no combat effectiveness. An idea off the top of my head: Custom Weapon skin. It's a soulbound item, trinket, spell, whatever that can change the appearance of one of your weapons. Basically you can make your weapon look like any other weapon you want. It has no combat value, beyond the base weapon, but makes you look unique.
Achievements shouldn't just be circuses for the masses to keep them in the game until you get all their money. Achievements need to serve some purpose.
Up next, Star Wars Galaxies, New Game Enhancements has something that probably should have been in the original game: Collections. It's like an Achievement system's loot-whore twin.