Ulduar had handfuls of pulls in a bosses room, run to the next boss with a handful of trash and repeat until the end. My vote would go with Mount Hyjal though as being the most tedious, boring, and painful trash in a raid ever. Especially if you wiped. Nightmares
But anyways, GW2 and now TERA will always be worth getting because you pay one time to get the whole game as you like it. It receives pretty constant updates and will only grow from here. I haven't logged on it in a while until recently, but it's mostly because I don't feel pressured to. I get on it when I want to play it and it's there for me in all it's already paid for glory.