Hallo Andy,
I'm sure you will like Zürich.
If you are willing to live in a WG (i.e.:a room in a shared apartment) I don't think you'll have much problems;
Try for example:
http://ch.easyroommate.com
Now and then you find also ads from people that leave their rooms/flats to stay abroad for a few months (exactly as you do

).
The only drawback of the site is that as "basic" member you can't contact people directly
Ciao and gook luck !