bargearse said..
As for what i like i guess just what europe can offer that other places cant - hence castles histrical stuff. Beautifull little towns with cobblestines and flowers and motes etc.
Well than you made a good choice with vienna.
I would also very highly recommend Salzburg (Austria), birthplace of Mozart.
Salzburg is a smaller city (150.000 people) vs Wien which has almost 2 million people living there.
Photo of Salzburg below (Mirabellgarten)