I don't like how 'types' are highlighted in C#. I'm not sure why, but I find it distracting. So I no longer use the C# keywords 'int', 'string', etc. I prefer to use the system types, Int32, String, explicitly. Mostly just because I don't like having two ways to express the same thing, and because I hate having my screen full of blue words..
It's funny to look back at code I've written over the past few years and see how my coding style has changed..
Oh, and it's a 'case' thing too. Because a 'type' or 'class' is supposed to start with a capital (i.e. PascalCasing).