I played WoW for a year now, and Guild Wars for about a month. I started Guild Wars because i was trying to make an objective decision as to which was better. (before i start this please keep in mind that i got INCREDIBLY bored of GW and couldn't force my self any further than level 11, so i'll take everyone's word on the endgame content)
WoW: Benefits
1. Social
2. Cheaper than seeing a 2h movie every night
3. PvE is ultimately Supreme
4. Dungeons/Raids
5. Mounts (i know, its SO obvious)
6. Extreme DIVERSITY
7. Questing areas aren't instanced, so if you see someone killing the same things as you, you can group.
8. You can jump. Also, you aren't forced to follow a path, as you can jump off a ledge (careful)
9. Addons. Lots and lots of addons.
10. The User Interface (buttons, menu, chat, minimap, etc.) is very detailed and easy to access.
Disadvantages:
1. Crap graphics
2. Might have to ignore trade chat in cities (spam. macros make it easy to do that)
3. $15 a month actually doesn't seem expensive in perspective to other kinds of entertainment, but its more expensive than GW.
4. Very very very addicting
5. Certain level brackets can be very hard to level through.
GW: Benefits
1. PvP SUPREME
2. no one to steal your kills
3. armor doesn't break
4. All-character bank
5. Cheap. $40
5. Graphics are great
6. You "aggro" circle is clearly shown on the minimap
7. Not goona glitch yourself and get stuck. ( /sigh. u can't jump if you do anyways)
8. City -> City teleporting
9. Doesn't matter what server you are on, as you can switch at ANY given time.
Disadvantages (was running out of benefits):
1. Can't go anywhere unless you follow a windy and monster-uinfested path
2. The user interface is VERY dull
3. You can't tell what server your friends are on unless they tell you. also you can't see WHERE they are. (/who in WoW)
4. I don't know if this happens to other people, but i felt very alienated when playing Guild Wars.
5. Hard to continue if you aren't addicted, but that goes for both games.
6. All enemies are in instances. Kinda sucks in IMO
Ok, those are my facts about both games. obviously, i'll go for WoW any day.
Please do correct me if i am wrong about either game.
These are FACTS, not opinions. You cannot discount them, you can only add to them.
Also, i'm sure quite a few people are going to make a list like mine then fill it with their OPINIONS of both games, but i suppose theres no way to stop that.
*Edit* Woot! i beat the long winded person in long windedyness!
also, WoW's new expension next year should make leveling a LOT more fun