Obviously a captain needs to have both leadership abilities, including both a high level of playing skill, but also people skills.
A captian needs to inspire and encourage his team, when they need it the most.
Harrogan did this with hard running and hitting, Joey does it with his sheer brilliance.
I can see Budreus being a captain, but also players such as Matt Gidley, even Steve Simpson.
Simmo's got a level head and he's the kind of guy who will bust his guts to get the job done.