I'll make my list. Not sure on how long it will be but I'll try and remember as many of my suggestions as I can. There are quite a few.
Seabass - Will he and his team keep his promise that they have listened to the fans such as myself for PES2010?
Ability to use 3rd kits. I can't see why this feature can't be included. It's simple, but would impress many fans.
You can change clubs in Master League mode. Since you are the 'manager', I feel that you should be able to have the chance to change clubs after the end of each season.
Improved AI. This covers many things but here are two; Goalkeepers must be improved. Also the CPU should 'pass it out' instead of hoofing it all the time. It just gets boring and repetitive defending the CPU's boring defensive tactics.
Edit stadium features in ML. I'd like to change the colour of the goalnets, corner flags and stadium seats. Also adding your clubs badge to these would be cool.
Improved/More ways of shooting. Holding 'RB' should be a controlled shot, which would be better than it is at the moment; All your shots are just pure power and don't focus on control.
Better atmosphere in finals/derbies. These big games must be different from your 'normal games'. The crowd should be louder and react to the referee decisions more.
No auto-tackles. These should be taken out completely. If you want to tackle someone, you can press the button yourself.
Ability to change your pitch size in ML. Limits should be set, although you should be able to change your pitch dimensions to match your teams style of play.
Better commentary. It's a shame that they have decided to keep Lawrenson, but at least improve what he says. Please no more embarrassing lines that make me want to play PES on mute.
Pre-season tournaments. Rather than playing friendlies, you should be able to host/join tournaments. It would be more enjoyable as you'll have something to play for.
Now 'Please Wait A Moment' loading screens on Master League. They're annoying. Get rid of them!
Players dribbling/speed abilities actually mean something. For example, the CPU can control G. Neville and catch up with Messi. Also, when I turn with Messi, the CPU reads it strait away and I have to pass it to get away.
More teams/leagues. Licensed or not, I don't mind. I'd accept having the 'German League' instead of the Bundesliga. At least we would have players, and editing the teams/players would be easier than having to make the teams from scratch.
Better crowd. I'm talking about a visual and audio sense. The home crowd should react more to referee's decisions. While 'boos' should be heard more often, but only at appropriate times. Official chants should be implemented too - If not, then 'neutral' chants should be put in.
Advertising boards. Konami should contact major companies to offer them and offer them a place on the PES advertising boards in-game.
Different types of corner kicks. If you press 'RB', the ball should be a 'controlled' cross, and if you press 'LB', the ball should be lofted up high. If you press 'RT', the cross should be a powerful but aimed at head head. Etc.
Goalkeeper kicks to have a 'power bar'. Same with penalties although that has already been as a confirmed change.
More preset faces in the game. This includes young players at big teams, and players who play for less-known clubs. All major teams should have 100% preset faces for all their players.
Fix the ML loan glitch. Seriously, I've just signed Messi, Kaka, Benzema, Puyol, Yaya Toure and Xavi for only 51P. I know it's good if you want your team full of superstars but it makes your ML mode unrealistic and that shouldn't happen.
More stadiums. We already know that Anfield is in the game, but I'd like to see more 'big stadiums. I would love Old Trafford, Emirates, Stamford Bridge to name a few. Although I highly doubt that these 3 will be included.
Better Menu Music. I can't stand some of the songs that are played on PES2009. With this and the shite commentary in mind, I sometimes play the game on mute. Real songs, real artists please.
A method of uploading your replays onto the internet, possible a site on the Konami servers. Then have the ability to download them from that source, and then have them on your PC - Then making PES videos will be easier/cheaper.
Snow. PES2009 has rain, so why not snow. It would make the game more realistic, and more fun in a way. In another sense, it would also be more challenging too. Also getting the 'orange ball' back would be awesome.
Replays to 'zoom out' more. The replays on PES2009 are way too zoomed in and you can't see the ball, and worse, you can't tell if it was a foul or not.
Get rid of the 'thud' when players pass the ball. When the commentator isn't talking, those constant noises can get really annoying. Don't make passing silent, but just make it more subtle than it currently is.
More online game modes. I only want this if the PES-lag is taken care of. Again I don't like complimenting FIFA, but I feel that PES should adopt some of their game modes to attract more online players.
Crowd, part 2. When playing certain teams, a particular atmosphere should be given. Two exmaples would be playing South Africa and some Eastern European side, lets say Dinamo Zagreb. Horns should be heard, as well as the fans appearing intimidating. Eg. Jumping up and down, 'men with microphones' and the crowd repeating that certain chant, etc.
Better lighting of the grass, and stadium shadows. The grass colours/texture should be improved. And the shadows created by the stadium shouldn't put the gamers off when playing.
I hope you enjoyed reading my thoughts. Please let me know what you think by leaving a comment. :)