Of course it also depends where you live and how easy it is to get a rental. In Perth the market is so tight that I probably wouldn't even care if my feet stuck to the carpet as long as I was assured that it would be clean when I moved in!
Yep, its pretty tight here in canberra too! I look at the basic structures and make sure it all looks in good order ie. decent carpet/curtains/ bathroom/kitchen . Normal household mess I dont care about at all, I can look through that easily. I am put off by awful smells though, because Im wary that it is coming from the carpet, in which case is hopeless ever eliminating it from a rental.