Football and league have different cultures so its hard to compare. At a football game in a major league there is regular chanting, followed by an eruption when a goal is scored.
In League it is much more agressive, with breaks, more tries etc and I find myself praising a good hit, bagging the ref, screaming like a madman when a break is made etc.
As a Liverpool fan, there is nothing better than to be near or in the Kop, hearing them sing "You'll never walk alone" before and near the end of a match, or doing the "we won it five times" chant, or the numerous chants for players. Its part of the game.
St George has a "Dragons Army" that likes to chant, but in comparison to the Kop, or other football crowds (even Sydney FC), it is pretty quiet and low-key.
Personally I cant think of anything better than a rousing Parra, Parra chant, and a huge applause / scarf waving at the end of the match.