Most Australian casinos have both types of slots now. I checked out Lucky Hour Casino bonuses for Aussie players and they offer a decent variety. Personally I prefer simpler classic-style slots because modern ones with too many features can be confusing. Three-reel slots are straightforward and you know exactly what you're getting. I play both types depending on my mood but classic slots are better when I just want to relax without thinking too much. The payouts might be smaller but the gameplay is easier to follow. Modern video slots with bonus rounds are fun occasionally but they eat through your balance faster. My advice is try both styles with small bets and see which one you enjoy more