So you don't have numbered streets in Australia?  You do have numbered addresses on the houses though right? In America normally there well be a main street (often called Main) that runs north and south and then moving east and west off of that there well be other named streets.  Then there are numbered streets that start in the downtown area that run east and west. They increment as you move north or south so it can be kind of confuseing because that means you have a number two street that is north of one and a number two street that is south of one. Then on top of that you have the east and west of the numbered streets depending on if you are east or west of that main street. So now do I really have you confused? 

Oh we have numbered streets, but not quite in the same way: we definitely don't do incremental numbered street names. I suppose it makes sense when you're building a new city. (I generally find streets confusing anyway; unless I have a visual in my head, I'm not good at finding places. It's why I use maps a lot) We just have haphazardly named streets, nothing sequential for the most part.

We also tend not to have a 'main street' in the sense that the central street to the city centre is not named that way. (Here I guess our main street is Swanston Street. It runs a fair good way though, and eventually it turns into St Kilda Road) But that name would differ in other cities. Don't ask me what they are, because invariably I don't pay attention to that when I travel.

Honestly, I think it's safe to say that I find any street-naming system confusing    (There is a bus-stop at the end of my street. However, the street does a curve to the left from my house, so technically speaking, the bus-stop is on an entirely different named street. There are also, come to think of it, a couple of same-named well-known roads in Melbourne, but in different suburbs. Making public transport slightly more confusing in the long run)

I think your streets are more organized then over here, esspecially when you get to very old towns with medival cores. There are streets so small that you can touch the houses on both sides, but of course they are very rare. So here streets are named by main features. Main Street would be one, but I guess since the older towns are more likely build around a market place there are a lot of market streets (or in Hamburg Goosemarket, Horsemarket etc.), then church or post or city hall or trainstation streets. Then important people, often former mayors. And in new parts of towns you get all kinds of flowers. I lived in a part of Hamburg that featured a "fairytale- settlement" They had a Princeway, Cinderellaway (that is also a bus station) and Rübezahl- Street (hmm, Rübezahl might make for an interesting puppet...).
I guess that must be even more confusing. I once got lost on cinderellaway- pity they don't have a yellow brick road....