I'm looking to start playing a mmorpg sometime in the near future and graphics, lore, and questing aside, i'm most interested in finding a game with a good and populated PvP system.
I know a question like, "Which PvP system is the best" would be closed immediately, so instead im going to ask for the key differences and defining characteristics of the PvP systems in WoW and Lotro.
Edit: Examples of PvP modeled game play in both Lotro and WoW would be helpful, as i'm trying to compare and contrast them.
I'm picking WoW and Lotro as my primary interests because i have friends who play both, and im unsure as to what the other 'mainstream' mmo's are. If there is another mmo whose PvP stands out above the rest, please feel free to mention it as well.