I'm late to the party here, but I'll crash it nonetheless. My impressions:
Likes-graphics finally look moderately impressive (hasn't happened in any incarnation for Castlevania since SoTN on the playstation)
-The environs look suitably moody
-The voice acting is impressive, Picard and Begbie!!
-Konami is clearly excited about this, and see it as a chance to finally bring the series into the mainstream.
-We finally have a non-androgynous, non-waifelike protagonist
Dislikes-Enemies appear to be cookie-cutter, numerous and uniform, not good
-The battling gameplay looks identical to God of War, which I grew bored with by the second game.
-The forested, viny area looks a little too bright and fantasy like for a Castlevania game.
-Too many werewolves
-No sign of candles, platforming, or anything else than exactly screams "Castlevania."
I'll graciously concede all these impressions, both positive and negative, are based on extremely limited information. Flash cuts in a trailer don't allow someone to get a clear picture of how a game feels or plays, but its all we have to go on right now. Overall I'm reserving judgment, but the overwhelming similarity to God of War is troubling.