I really like Yu-Gi-Oh, and I'm already what many would call a veteran player after only a year since I got my first deck (original Yugi).
Duel Masters looks OK, and I'm thinking about buying myself a starter deck for Christmas so I can learn how to play, but Yu-Gi-Oh will always have my dueling heart.
I even used to play Pokemon, but now I think it's really dumb (sorry pkmn fans!). The energy-use system is confusing and wierd. I sold a whole shoebox full of Pokemon cards, with my movie Mewtwo and other rare cards in it, for 8 bucks. Get this- I bought 2 Yu-Gi-Oh boosters and a pop with it!
I've never seen any other of the cards listed, except that I used to have a Metalmamemon Digimon card, but that was it. I voted for Yu-Gi-Oh, and I always will!