I know that there was a referendum after it where 99% or so voted in favor of it (which is enough to know the vote war partially rigged) but did Austrians generally favor the Anschluss or not?
They certainly were. They tried to make it happen immediately after WW1 but the allies wouldn't allow it.
The Austrian constitution included the goal of uniting with the German Republic, as did Germany's, and I remember reading that a higher percentage of Austrians actually served in the military than did Germans.
Okay, time for some backstory. This question goes back to the time of the Holy Roman Empire, which, from the end of the middle ages onwards, was mostly dominated by the Habsburgs. The matter of Austrian ethnicity is very complex, some people argue that there is no such thing as Austrian ethnicity, while others say that it is fundamentally different from German ethnicity. This conflict gained momentum in the 19th century with Prussia opposing the Habsburgs and eventually managing to unify what then became Germany – without the Habsburgs, who went on to create their own Austrian Empire. Anyway, the German-speaking party of the Habsburg territories was always its core, but due to the multi-ethnic nature, the term "Germans" was more common than "Austrian" for its inhabitants.
Then, the first world war came along and all other parts of the (by now) Austro-Hungarian Empire broke away – Czechoslovakia, northern Italy, Hungary, etc. What remained was basically today’s Austria. The republic was declared in 1918 and the new constitution stated that this new state should be called "Deutsch-Österreich" (German Austria) and was part of the German Empire. In the peace treaties of 1919, it was forced to drop this part of the constitution and to change the name to simply "Österreich" (Austria). Hardly anybody at the time would have minded joining Germany (the federal state of Tyrol even organised a referendum in which a majority voted for joining Germany), and many influential figures thought little, poor Austria had no chance of surviving as an independent state. It did, however – and after a brief period of democracy, 1934 saw the rise of "Austrofascism" which was, although it had obvious fascist tendencies, mostly anti-Hitler. Austria then aligned itself with Mussolini, who vowed to protect it against German aggression, but once he became friends with Hitler, it was only a matter of time until the Anschluss happened.
Obviously, nobody had seen that many bad sides of Hitler yet, or at least was prepared to accept those negatives in exchange for a prospering economy, so when Hitler annexed Austria in March 1938, he was greeted with enthusiasm by the Austrians. He held a famous speech from the Hofburg in Vienna. The pictures of him addressing the cheering crowds are famous and are to this day used to illustrate the enthusiastic welcome Hitler received in Austria.
Even though it’s unclear how many of the influential figures that publicly supported the Anschluss did so out of fear, it’s safe to say that the overwhelming majority of Austrians was glad to be part of Germany or at least didn’t really mind.
In the years following the second world war, Austria wanted to portray itself as Hitler’s first victim, which worked at first. This idea was the official stance of the Austrian state and was also enshrined in the Moscow Declaration of 1943. In more recent years, however, the public is beginning to accept the fact that Austria was not at all innocent, and of course the state has apologised to victims of Nazi terror, etc. since then.
Reuniting with Germany is a very, very marginal idea in Austria these days, even within the right and far right. Supporters of what may well be Austria’s biggest party at the moment, the FPÖ (which is in opposition), consist mainly of right-populist "patriots" who are in favour of an independent Austria. There is a German nationalist wing within the FPÖ, though, which consists mainly of its more sophisticated members (this also has to do with the fascinating [not necessarily fascinating in a positive way] tradition of the Burschenschaften, maybe you’ve heard of them). This wing is very minute, though, and even its most prominent members avoid questioning the the Austrian state. Instead, they stress that they are "cultural" or "ethnic" Germans as opposed to Austrians.
Hope this answered your question adequately, feel free to ask for more info or background.
