I have do admit, I don´t like games that need a Master to play, mainly because I always have to be that guy and I hate to orchestrate games when I could have an adventure at the same time :D
Which is why I love Coop-Games or good asynch-2 player-games like Claustrophobia.
I´m really looking forward to Essen this year, I already know I´ll burn so much money there...and I don´t even know how to transport all those games...just because I feel like it, here´s a list of the things I wanna get.
Quarriors (if I can´t it earlier, Amazon lists it for the end of this month)
Elder Sign (to replace Arkham Horror basically since we never have enough time to play that game)
Gears of War the Boardgame
Dungeon Run
Super Dungeon Explore (cause it´s SUPER

)
Ares Project
Blood Bowl Card game
Eminent Domain
Dominant Species
Dragon Rampage
Those are the ones that I could list from the top of my head though not all of them are really necessary. What I really want are Quarriors and the Gears game, that looks like simple and fast Coop-Fun on random maps which is awesome.