I wouldn't normally push my nose into the arguments of others, but as this seems to be a constant source of argument and disagreement across many football boards, I'm going to submit my two penn'orth here:
The teams that "win most often" are the teams that can adapt their style of play to that required at the time. The vast majority of teams which stick to a single approach to a game tend to be only moderately successful at best. Take Arsenal as an example, who for a number of years have been seemingly attempting to copy Barca, except with marginally less-talented players. In a decade they have won a single trophy, which for a team as big and with as much history as Arsenal is pretty much on a par with our own record of success. Barca play in a pretty one-dimensional way, not varying their game, and have had success with it, but look at the players they have to accomplish that. It *CAN* work if you have that level of exceptional talent, which very few do. That said - for the most part - I find them quite dull to watch. Arsenal too.
Now look at Man U, Man City, Chelsea, Real Madrid and Bayern Munich. These are all teams which vary their game and style according to the opposition they face. Real play the tippy-tappy tiki-taka stuff sometimes, but then break with pace and power. Bayern - now managed by the bloke how *INVENTED* the tiki-taka style - don't play that style consistently, only when necessary.
Success means changing what needs changing, when you need to change it, to ensure that your success continues.
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Now, on the Manager front, allow me to say this:
FOR THE LOVE OF GOD, PELE AND THE QUEEN PLEASE DON'T APPOINT PHIL PARKINSON!!