You're probably only going to get biased opinions about this, either people are bored to tears with WoW, or are still enjoying the fun of exploration and levelling up and haven't experienced the endgame grind for rep and slight gear upgrades once a month.

While LOTRO is a totally fresh release that hasn't been fully explored to end game. Personally I think LOTRO shows a lot more promise, with a far superior crafting system, an inspired PvP system, stunning graphics and amazing backdrops, an intuitive quest and grouping system.

Having said that, I've played WoW from beta until a month ago, and experienced the level 60 stall, and now the level 70 stall. So my view is a little biased.

I will say that by the end of the WoW beta, I had reservations about the longevity of the game (i.e. how long I would play it). Those same reservations don't exist for me for LOTRO. I've purchased two copies myself, with the aim of perhaps running two accounts...

Counter Strike: Source

Starcraft

Any of the multitudes of Half Life mods

Jedi Knight II

Myth II

Why don't you get a trial disc and make up your own dang mind!capthavic

Is that really nessacary?

Go to you're local EB, Target or Myer, they'll more than likely have the trial version for sale for like $5 or something, then it's just a matter of patching for about 2 hours and you get 14 days free play.