I only learned Javascript and PHP in school before I dropped out and Im still writing programs and games that run in internet browsers with plain javascript until today =)
Did you guys tried Rust already? So great language. Has no possibility to leak memory like C/C++ and works also on machine level, without VM like C#/Java etc.
It has no classes so little hard to learn but have a try, you won't regress.
I Really love python but since I'm started to learn Javascript I'm beginning to like that to.
Haskell is also an very interesting language, but I'm not sure where you use it besides from your one homeprojects