What if Zuko was a shameless womanizer who carried concubines aboard his ship and specialized in first date hookups? (Tales of Ba Sing Se...?)
What if Iroh, instead of being an avid tea drinker, was an alcoholic, and hit the bars hard in every new city he arrived in?
What if Sokka had a 'fro instead of that stupid wolf tail thing?
What if Katara was a lesbian? It would certainly make for some interesting ships.
This is fun.