Here's a general discussion topic: With regard to European travel, do you decide when to go or where to go first? And what then impacts the final combination of where and when?
It seems to me that if one makes the where decision first, one would then make a decision of when based on weather and climate suitable for activities desired. For example, if one wants to see Switzerland, hang glide, and hike in the mountains, one would opt for late spring, summer, or autumn.
If you make the when decision first, one would, presumably, select a destination that is suitable for the season. If when is July because of school break but you hate the heat, perhaps one would not go to southern Italy. If when is February then perhaps a ski destination or a great city with lots of museums in case of inclement weather.
For those of you who have traveled many times over the years, what advice would you have for newcomers to European travel on deciding where versus when?