I recommend Melbourne. The series' are shorter than the US ones, there isn't a daunting amount to catch up on, and it has one of the highest killer:filler ratios of what I have seen. The casting is top class as well.
Melbourne (currently four seasons) followed by Syndey and Auckland (one season each) has been my trajectory - I get daunted by anything with over five or six seasons, especially when the seasons are long (all the Aussie/NZ versions are around the ten episodes per season mark).
Yeah, Melbourne is perfect. Melbourne/Sydney/Auckland/Vancouver are all quick series, not too many episodes and all hit the ground running. Melbourne though is such a stellar cast and brings it from day one.
The US ones are just often so long that you really need to be *ready* to get into one, but obviously well worth it (or so I hope!).
Hayu is such good value. I just wished they had Survivor on there (I am secretly a huge Survivor fan, so having the 40 series + international editions would be a RIGHT TREAT for me), but there is enough Housewives to keep me occupied. When I considered it literally cost the same as a pint I figured I could shell out for it