Generally speaking Oz is a nice place, it haa its share of weirdo's etc but pretty much most people will say g'day if you pass each other.
Culture is as varied as most modern countries, plenty of good restaurants etc around the cities, closer you go to the coasts the more laid back it gets, same if you head into northern qld or the northern Territory, plenty of blue singlets up that way.
Weather is varied, Tasmania in the south can be four seasons in a day and can produce bitterly cold winters.
Northern qld etc is tropics, why Brisbane is good, sub tropics, not to hot (but can get pretty sweaty in peak summer) and not to cold in winter, spring and autumn being the pick of seasons for me.
Fishing is very varied to, fresh water (introduced) trout and native species of freshwater cod and bass in the cooler areas, Tailor (bluefish) and varied reef type fish down south, North you get jungle perch, sooty grunter, Saratoga, bass, barramundi in the freshwater rivers and lakes, mangrove jack (red snapper) barramundi, threadfin salmon, jew fish, cod so on so on on the salt riverz, blue water, we get a bunch of different tuna including the southern bluefin and yellowfin, Spanish mackeral, wahoo, spotty and school makeral to list a few of the pelagics, various Deepwater 'hoodlum' species like amberjack, kingfish etc, all the reef fish you could want to, giant trevally, golden trevally (flats) silver trevally (down south) diamond trevally so on so on, black and Blue Marlin, sail fish on the west.
Plenty of variety to say the least.
Sharks, crocodiles, lots of snakes (I hate snakes) some pretty nasty spiders and various other things you just have to accept are here or you would never leave the house.
Everyone should see Australia (and NZ) just like I think everyone should see the United states and Canada and BC