One reason I like achievements is because they give you a checklist of things to do. I like seeing the entire game, and large, complex games have facets I would not even think to look for. There are many ways to direct players to that content, but an easy one is just listing, “Hey, have you tried X?” In Guild Wars, the Hall of Monuments and the wiki are helping me find all the things I can do.
Honestly all I can think of when I start reading this kind of stuff is… work. For some reason, it just all seems like too much effort for not enough reward. To me, when I feel like I need to read a guide about how to make something happen, it feels like the game designers really messed up. I have like 3 points and I guess that is about all I’m going to get.
I obviously differ, but let me point out that, if you have played through Guild Wars and have Eye of the North, you already have more points than you may know. If you have completed any campaign, you have at least 5 points available (3 for linking, 2 for first Honor monument). A level 20 Ranger pet is another 2. Any miniature is another 1, 2 if rare or unique, 3 if you have both. Any fancy armor or weapon is another 1-4. If you already ran through the campaigns and have your Monumental Tapestries up in Eye of the North, you just need a few minutes to figure out how to cash in your checklist. And from there, you can see if there is anything else interesting you forgot to try. Getting a lot of points is work, but you can get a dozen on accident.