First time we were there with young kids, I think Lippizaner and Schonbrunn were the big hits. Just a few years ago we stayed overnight on a river cruise, my wife and I just wandered around revisiting places we'd been the first time, soaking up the atmosphere of the city.
First trip we also saw Salzburg (my wife's a big big Sound of Music fan) and Innsbruck, in the cruise we came down the Danube from Passau and stopped at Melk and Krems before reaching Vienna and then on to Budapest.
So I guess we've seen a bit of your wonderful country.
Awesome :) But it sounds like you concetrated on the bigger cities - Did you see some of our beautiful nature? (Expect the Danube of course)
You're right. We did drive most of the way between Vienna and Innsbruck in an ice-storm - with my Canadian winter driving skills I was the only one on the autobahn - does that count as nature?