Heart and soul is a term overused nowadays, yet it fits Gallagher well. He doesn't sleep. He doesn't even take breaks. A fantastic example and mentor, he plays injured, isn't afraid of the public, does things with the team (see Habs videos). Some supporters have mentioned his strained ties with officials. Talking to officials is now a minor part of being a captain. Gally excels in her job as a team player. He also extended his contract.
Byron is the second hardest worker on this Habs team, after Gallagher. An overpaid player on a cap-strapped team? Byron has been placed on waivers several times to save the Canadiens money. Just having him as captain might be problematic.