Lord of the Rings Online is excellent.
I'm playing on the FireFoot server - dunno why the word 'Fire' attracted me. At any rate, my daughter and I are playing and I'm finding it to be a very finely crafted experience. The evidence of developers who really care is everywhere I've looked. The game has limited PvP (you can spar anyone, or play a monster class) but it mostly revolves around quests (some of which are instance based). It would be an excellent choice for those of you who are too busy to throw yourself into a huge time committment.
I thought the story line would be cheesy but I find I'm enjoying it immensely. While it is true that many of the quests are "go there and get 5 of X" the epic story line is actually very entertaining. The epic story line unfolds all the way through the game while a variety of other quest types (race based, class based, profession based, and random) keep you busy - leveling is painless as you earn the majority of your experience points by completing quests.
The game has had another expansion (Mirkwood) with yet another expansion coming in the fall of 2010.
You can play for free for 10 days by visiting www.lotro.com