I have only a few things to say: Character. Based. 'Puzzles'. I've played too many adventure games in the past few years (i.e, most of them) that concentrated far too much on Object X + Object Y == Result Z. Remember the original Maniac Mansion? Remember how you could ring the door bell and Weird Ed would make his way down to the front door? You could then get another character to go into his room and loot the place. Take the hamster, microwave it. Show it to Weird Ed and he'd kill you. Play the tentacle mating tune to green tentacle and... you know.
I recently played the Syberia 2 demo. Crap. Totally asstastic. I spent the first 10 minutes walking through interactionless screens. Put a -game- into the adventure -game- please.
That is all.