As I told you guys earlier, am a new comer in sports but am keen with all those matches of this season as I started with CAF. I ve watched 3/4 of those English and Spanish teams and I single out Barca. Just because I see as if R is the one giving other players morale in the pitch and doing 80% of the work. Good example I ve noticed Et'oo mostly is psyched up after Ronaldinho has scored and thats when he comes out wild and daring the opponents. He is such a good player Kudos E'too!. I noticed Barca does not have very good defence compared to that one of Makelele and Eboue but their morale is so high. I think with the World player around they feel at peace and at ease. Thats my own observation and anyone who has watched that team without Ronaldinho on the ground can educate me on pitch work.
Whats your own views about this?

well, they have messi. and yes their defence isn't grand but they got the best attack on the planet (besides juve)

@Priscila
I don't necessarily subscribe to your school of thought. While Ronaldinho might still be a major influence on the team, the main danger-man for Barca currently is Lionel Messi. When he plays along with Eto'o and Ronaldinho, there seems to be no stopping Barca.