How many have learned a language they hated just to get a job? 
cperciva: On my CV I have "Languages used: C, sh, perl, awk, Maple, x86 assembly" immediately followed by "Languages NOT used: C++, Java, Erlang, Haskell, Python, Ruby, PHP, C#".  I'm sure it has resulted in me not being offered some jobs, but I'm not sure if it has cost me any jobs which I might have considered accepting.Don't ask what languages are being widely used.  Ask first what jobs/companies you're interested in; then find out what languages they require.