I realize I have a heavy bias here, but I daresay random battles are more interesting. You are dealt a random set of cards, and it's a test of how well you know -every- Pokemon, and not just the OU/Uber metagame. I like the idea of being able to balance every Pokemon by level and the aid of some moves. My only complaint is the use of Fakemon, but that's just me.
Again, this is all just my opinion. --- "Yo Dr Insano, I'm really happy for u and I'm a let you finish, but womens rights was one of the best trolls ever." - Valkskorn