For me it was roughly in the following order:

• Logo
• BBC BASIC
• Pascal / Turbo Pascal
• C / C++
• Informix 4GL
• T-SQL
• Delphi / MySQL
• PL/SQL
• C#
• ASP.Net MVC (C#)
• JavaScript

Lately I am trying to learn as much R and Powershell as I have time for...