Well if you are used to playing just FIFA all the time that is no surprise, because it doesn't play like FIFA. It's like those people who play COD for 4 years and then pick up Battlefield and say 'this is shit' because it doesn't play the same as COD, it's unfamiliar and you cannot expect to be able to find it as good even after 30 or 40 games, never mind the 1 which most players give it.
Personally I was a FIFA player in the initial games until ISS Pro, FIFA went downhill with robotic play and PES uphill, then the last few years FIFA has clearly been better overall. I will still play the odd game of FIFA and can play it to an 80% level of competence considering I don't know all the niches. Having played both demos there was a lot more familiarity in FIFA. I don't play an awful lot of PES either these days but definitely more than FIFA, I enjoy it more even with the inferior overall game, just the way the game feels, more freedom in my opinion. To me it has a harder learning curve and is very frustrating initially. FIFA seems easier to pick up and play. I think they have adjusted some of the defending and made the attacking play a little less 'arcadey'. I've been on both FIFA and PES forums and these particular aspects are making quite a few FIFA players (probably younger players) talk about changing to PES, but I think once they realise that the defending system in PES 2012 is even trickier than FIFA they will soon revert back.
In fact I still can't get used to the defending in PES 2012, it makes me want to snap my controller in half, maybe I am a sadist for persevering with the game but I also get more reward out of it. I'm not one of those players who want to pick up a game and score a wonder goal in the first match, the life span of that game will not last very long for me. I think both games have addressed that this year by the look of the demos.
