Like you, I was a self taught developer working on PHP. I switched jobs to a Python shop and love it. It is so clean and nice to write. That said, I think I

Like you, I was a self taught developer working on PHP. I switched jobs to a Python shop and love it. It is so clean and nice to write. That said, I think I like JavaScript the most. Simply because I know it the best, it's simple, and flexible. I picked up Objective-C last year and really liked it too. All that to say, there's a lot more out there and I think you should definitely explore outside of PHP. Once you get comfortable with a couple the rest come much easier and it doesn't really matter anymore.