I have always had language envy: I grew up with a bunch of diplo-brats and others who were multi-lingual, but my parents' house was always firmly monolingual. Later on, I was able to study languages, and have gotten to where my French is fairly good (or was, until I stopped practicing) and I speak enough Spanish to survive.
Today, science has provided me with an excuse to work harder in this area: being bilingual protects cognitive function
from age-related decline! So that's a good enough reason for me to go live somewhere and learn to be fluent in something besides English!!