We've had a fuckton of football games so far and none and captured the magic involved in scoring a PES5 or PES6 goal. The shooting mechanic was absolutely flawless in that game. Just about every goal was unique. No two goals were the same. Now with FIFA, whenever I score a goal, it seems like I've seen it all.
Not as big as you think. It's huge in the UK, but that's about it. Italy is still PES country. I think France is too. There's only one sad, lonely German playing PES in Germany though, AFAIK. He's a Bayern fan.
There are quite a few things lacking in FIFA (player individuality, momentum, team mate AI) and PES is arguably better at them. The unfortunate thing is, all the other things in PES are so bland/broken that the current FIFA is definitely more fun. Playing PES 2012 felt like a chore. What made PES 4/5/6 great is a fine balance of fun game play and approximations of realistic features.