Hrmmm, i love all three games to death but if i HAD to choose.
DMC - DMC3 has a deeper combat system than NG regardless of what some would say. In NG, I would find myself doing the same Izuna drops, wall jump + slash and instant charge all the time to survive. In DMC3 you have to mix things up or jump cancel to keep the combo system going. DMC has very different/unique enemies, cool weapons, multiple styles, awesome bosses and the Devil Trigger done right (unlike GOW's lame "spartan" or "gaia flaming mode"). And also... you can't truely block in DMC, so you're always on your toes.
GOW - The actual battle system isn't spectacular and it's too easy even in hard difficulty, but the story, level design, puzzle and platforming aspects is on another level compared to NG and DMC combined. No other slasher game even gets close to GOW in terms of a cinematic experience.
NG - Right behind DMC3 and GOW by a very very slight margin IMO. The combat has never felt so pure and rewarding before. This is the hardcore gamer's action game. My only problem with the game is it's horrible story and very boring level designs. Before the game turned into instant charging and wall jump slashes, NG probably had the most intense action have ever seen in a game.
Either way, all games are fantastic (except DMC2, that one sucked real bad). Anyone that says any of these games plain sucks probably can't back it up with reasonable logic.
