What sort of trips do you like? City/country/culture/solitude/bustling?
I'd suggest a good festive city, with Christmas Markets in fulls swing - Germany, Belgium and France have great ones. London, where I am, is also very festive, albeit usually a bit on the wet and chilly side.
It's not the ideal weather for outdoor activities, unless you are hardy... but renting a cottage can be very cosy with great walks and a good fire going. It's usually good weather for cycling, and places like vineyards will usually be open.
And I do have a thing for Italy, the food and wine is fabulous, and all the history is amazing....