This is a difficult one as there are so many nice beers out there and it depends on the moment.
I am a member of Beermasons so have had plenty of really nice beers through those guys.
But I will say a beer that I have enjoyed a lot recently was Arctic Fox APA on tap at Mrs Parma's in Little Bourke St East Melbourne.
Bloody beautiful beer and as I am heading back over to Melbourne this week will definately have a couple while there.