Hi
I live in Nyon and commute to work in Geneva, near the airport. It takes about 20mins to 40mins from door to door depending what time in the morning you leave and the traffic. A lot of people do this journey in the morning so there can be a lot of traffic depending what time you leave.
Also the train from Nyon to Geneva airport is about 20mins and depending where you work you maybe able to work or take a shuttle.
Nyon is a nice place to live, very pictureques in the old town, especially in the spring or summer, but is quiet in the winter months. It is great if you are an outdoor person, you can just hop on your bike and go cycling at the weekends or evenings. If you are more of a party person you might prefer to live in Geneva, there is more action going on there, which is 20mins on the train/car from Nyon .
Geneva tends to be more expensive to rent...and i think it is hard to find an appartment with a lift and/or parking there, which personally would drive me nuts with shopping bags. In a way if you live in geneva there is no point using a car to go to work, but maybe you would still want a car at the weekend for skiing, big supermarket shop, however...you could use
www.le-shop.ch and have your groceries delivered at home.
For socialising in Nyon, it takes a while to get to know people. I have been here a year now and have some friends finally based in Nyon as well as Geneva and surrounding areas...
www.genevaonline.ch is a great way to get to do people and join in with activities with other likeminded people....and for radio 88.4FM (WRG) and English radio channel good for traffic reports if you commute to Geneva from Nyon and also to hear about events going on...
Hope this helps