I come from Java/JEE and I would choose Ruby any day of the week. Some former colleagues had bad Python experiences. Some others have their first working experience in Ruby and want to go somewhere where the grass is greener.

IMO what makes programmers happy is not so much a programming language in particular but rather the context surrounding the job: role in the team, age of the codebase, fun colleagues, level of "corporatism", good or bad management if any, how much code you are able to ship per day, etc.