For example, I plan on learning Java sometime, mainly because of the amazing portability (thanks JVM). But Java cannot incorporate other languages into it very well, what with the idea of Java being the "all-purpose language". I like the idea of incorporating a language like Python into my programs; I don't want that taken away. So, perhaps I'll do some stuff with it for some time, but I want to be more adept at languages like C#, SQL, or C++.
This is a very open discussion here. If you want to ask more about my experience, or anything else, then fire away.