AUD/USD has always been my favorite....until of as late - too thinly traded right now. Should pick up again in the new year....It provides some great moves and is more readable(imo) than EUR/JPY (which is probably the best for big intraday moves).
If you can follow all of the drivers behind the AUD, you can enter some good trades with confidence.....equity markets, commodities, and it's carry trade/risk aversion buddies (AUD/JPY, USD/JPY, EUR/JPY, NZD/USD).
Keep fit, and have fun!