Playing a NG Cleric of Ganesha, remover of obstacles, right now. He does things like: heal limping commoners in the street, help people get from one place to another, stop what he is doing to help people repair a bridge, oh and kill evil things like goblins, drow, and assorted demonspawn. OTOH I had a Paladin in a past game who,while he would aid others and do nothing illegal or evil, was mainly focused on his order's quest to drive out a black dragon and its minions. Unless he needed to he basically ignored the minor injustices of day to day life to focus on his mission. As others have said, however, generally in RPGs "good" means "opposed to evil" more than anything else.