My choices are:
1. Puyol
2. Marquez
3. Xavi
I Don't think i have to explaine why Puyol is my first pick, so i'll move on to Rafa Marquez.
Rafa's playing for the club for 6 years now. beside being one of the veterans in our squad, he has the qualities of a Capitain. He's a born leader, he's devoted, committed, fighter and he always gives his best on the pitch. if you want to know what devotion is, check the game againt Reial on the camp this year. when Drenthe was one on one with VV, Marquez ran after him like crazy and managed to get the ball after Drenthe missed. it was one of the best games i've seen from a defender.
Xavi's not Captain material. he's not a leader, he sometimes 'goes to sleep' during the game, he's not the strongest man on the pitch, but like Puyol, he's Barcelona. one club man, a magician on the pitch. when he's at his best, no other midfielder in the world can control a ball like he does nor can play smartly like Xavi. he's a veteran, the heir of Pep, one of the true greatests. Those only, should earn him the Capita ribbon.
A Different chioce - Henry. he may not be Barcelonista in his vains, but there's no match for Experience. Beside winning the Champions Cup, he achieved everything, he saw everything in his career and his character is very plesent.