How my coding habits changed since 1990?

I start writing code since 1990 when I was in high school , today 18 years later when I think how my coding habits changed, I found three major events that effected the way I write code:

• Introduction of design patterns by GOF
• Introduction of garbage collector in Java and I need no more to free allocated memory
• Introduction of Test driven development

other than this I think the way I write code remain the same wither I code in Java, C# , Ruby or whatever else