What I know and like in information technology
With my first PC I was a lot in 3d-Graphics, Gaming and just MS-DOS/Windows/Office. I liked a lot complex Excel-sheets and nice POVRay source files rendered then with the help of my math FPU bought for the occasion.
I then had a time where only Linux was something for me. I also painted the pinguin myself on a mug. Linux has still the same value, but the company where I used to work wouldn't introduce it...
As an UNIX administrator I began to love perl.
With my first job came then the other things: SUN/HP-UX/AIX system administration,
Windows NT, ClearCase, and a lot of other things.
I will probably add here an exhaustive list of links to my favorite things soon...