i'm more of an adventure quest person. i like the way they seem to be bringing in new mechanics for each quest. i think that is what keeps it interesting, otherwise it would just be like playing the same game everytime, over and over, but with different pictures on the cards.
one mechanic which i thought was really good, which i think they should bring back, was the one in "massing at osgiliath". they made it so the locations were all on one river bank or the other. and you couldn't travel to some of the locations until you crossed the river bank. that was the closest they've ever got to making the locations feel like real locations in a real place, i think, instead of just random ones out of the deck. they should do more of that kind of thing.
one idea i had which i thought might be quite good, which is the same kind of thing, is having a location off in the distance which you are travelling towards as quickly as possible, but dont actually get there until stage 2 of the quest, or whatever. and every time a certain kind of enemy came off of the encounter deck, it would just go under the location, out of play until you reached the location -- so they'd be building up their forces. so the more time you took to get to the location, the more time the enemies had to gather their strength. it would be like marching towards a hill, and seeing the enemy army grow and grow as time went by.
come to think of it… isnt there a quest in the khazad-dum box which is a bit like that? where the enemies gather behind a gate until you break it down? i like that kind of thing. locations can sometimes be the weakest part of this game, i think. and the more they can do to make them feel like actual places that you are heading towards, the better