you dont always get to choose. many times the technologies used for a project are based upon requirements like hardware, contracts, existing software, etc. being a versatile programmer means doing what you need to to get the job done. sure a program might be better served written in c vs python, but the client might have other reasons for why they want it in one lang over another.

also, as a polygot programmer/scripter i can honestly say i dont have a favorite language. they all have their faults.