No worries, you won't get to see mature stuff... In fact, I have this feeling versions all over the world will be watered down because of Australia. FO3 anyone?
I say, dear Aussies, book your tickets for New Zealand now (that's to say if they're more like most of Europe: no censoring)! I hope everyone sees I don't wish to bash any country here.
But, I guess I'm just going to get lost in the clamour of voices calling for more blood and guts... Oblivion did it fine, maybe just a tad more than that, but nothing more. No decapitations please, no "look at all that blood and gore splashed across the ground", no Splatterhouse level of gore and digusuting stuff like that. Keep it clean dudes. I don't want my parents or someone to come over and see all that kind of stuff...
I'm sorry, but seeing that full impacts of a warhammer on a Bosmer's puny head didn't make a bruise advocates improvement.
Think about it. The level of gore, nudity, six, whatever in the game -- would you want your boss or grandma to see you playing that? If the answer is "no", then there is something wrong.
I don't think any sensible person plays any TES game while his/her boss or grandma is standing next to him/her. In the former case, this usually equals getting fired.