My real, true first exposure to programming was Qbasic on a Windows XP machine, followed by real BASIC on a Commodore 64, then Java. But I don't count any of that, I never really built anything, just plugged in examples. I consider my true native language to be C#. It was the first language I ever built anything real with, and my first taste of what being a Real Programmer was.
It absolutely has flavored my programming in any language. The way I name and structure things is ""bad"" C++ programming, but I'm fluent in C# concepts in a way I'm not with other languages.
I've also developed a deep distaste for non-C languages. Or maybe I'm just getting old and curmudgeonly.