Totally agree. While it's true you won't master every language you learn, I find I transfer little gems and idioms from one language into the languages I use on

Totally agree. While it's true you won't master every language you learn, I find I transfer little gems and idioms from one language into the languages I use on a daily basis. I pretty much ignored the dynamic programming available in C# until I worked with Perl for a year. I've also transferred some functional programming idioms into my Perl and Objective C.