The way Manchester United played in the Champions League last year is my ideal kind of football. I'm bringing them up because we actually have quite similar squads.
They essentially played a formation which easily switched between 4-4-2 and 4-3-3, and what we lack to play like they did is a creative midfielder and better fullbacks.
On paper you had this:
Van der Sar
Brown, Ferdinand, Vidic, Evra
Hargreaves, Scholes, Carrick, Ronaldo
Tevez, Rooney
With Ronaldo and Evra being the more attacking pair, and the opposite side providing width whenever necessary but also able to strengthen the defence and midfield. In attack, this would become pretty much a 4-3-3.
In our team, Marchisio can be our Hargreaves. Giovinco = Ronaldo. Amauri and Del Piero are not worse than Tevez and Rooney in terms of being able to bring the rest into play. (or anything else, really). And like I have said before, Marchisio has everything necessary to be a good right midfielder if he has other players around him who are more attacking.