Do I think that there is one language that is best? No. I can say that with a high degree of confidence. Each language has it's own idiosyncrasies. If the first language that was created was the best, we wouldn't be using anything else. But we all know that there are issues with each language, and each language was often created to make an aspect of another language easier/better.
Last week I recommended not attempting to solve a particular problem with python. The solution was already partially coded up in perl and it just didn't make sense to re-solve the problem (simple data parsing) all over again. It got me to thinking, was this the right suggestion? I think the final result of the script should have been in perl, however learning to do it in python was a good idea. It would improve their toolbox.
I realized I should encourage writing things in a variety of languages. Why? So you know which tool to use. I came to realize that parsing data was easy to do in perl 90% of the time. If I knew python better I would probably feel the same way about python. The issue isn't about python vs perl vs java vs c++ vs c#, the issue is knowing what to use when.
I know that if I want to make a simple fast to build gui application I can use Visual Basic. Joe Blow will use Java, and Jim Bo will use Perl. Are any of them wrong? No, what you use, depends on your tools available. If you know how to do the same thing in 5 different languages, you'll start using a default for one set of problems, another for another, and mixing them if necessary.
I can solve the same problem in every single language, but the issue is, which is easier to do it with? Do some research, if you find that dragging and dropping a button onto a form is easier then writing the back end required to create you idea. DO IT! There is nothing more encouraging then building something and actually seeing it working, then spending tons of time building something and never seeing it come to fruition.