For pure footballing ability it's between Silva and Aguero... Aguero is just unbelievable but as personal preference I just love the magic Silva can concoct from so little so he probably edges it.
As an example, I could watch his pass to Dzeko at the swamp all day long, I don't even have to watch the actual finish. It's just brilliant.
I guess things may be revised in the next three years, Aguero has the potential to achieve so much more and project himself to world player of the year level.
Until Silva adds 20 goals a season to his game he just won't get to that level in terms of plaudits.
Ignoring football only perspective, Zabba and Fernandinho are players I love for their commitment on the pitch. If Kompany can maintain the form he achieves on his best days, consistently then he has to be up there too. His celebration against the rags and West Brom in the opening game shows how much City means to him.
We've got one hell of a squad despite the fact they're clearly only here for money and are a bunch of mercenaries ;)