As a note, these languages do cross over. While you're more likely to see .NET in a corporate setting I've worked in numerous agencies and startups that have us

As a note, these languages do cross over. While you're more likely to see .NET in a corporate setting I've worked in numerous agencies and startups that have used .NET. I've also worked with corporations that solely use Python. It seems pretty obvious, but a small minority of developers tend to see the world as black and white. Choosing a language that makes you happy is paramount, and if you're lucky you could end up as a C# programmer working at a startup, or as a PHP developer earning megabucks in the corporate world.