C3 years experience
I really like the power over details and performance C can provide. Professionally, one project I've worked on in C is an SSL/TLS parser.
Python7 years experience
I've written gobs of Python code and it's the language I suggest that programmers begin with. I keep current on language developments and enjoy Python quite a bit.
I've been writing JS so long I remember using AJAX techniques before AJAX was an acronym.