If you demand respect or gratitude for your volunteer work, you're doing volunteering wrong.
My first PC, a 286. Still remember all the sounds it did (from checking the memory, the CPU, the GPU, the drives and the extension cards) and the sequence they played. Wish I had it recorded at the time, because it was very iconic.
Another blast from the past: My most hated boot sequence is from our old 56k modem. God, were those things annoyingly noisy.
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454
There was none. Flick the switch > game. Done.
I always loved the startup sequence of the original Xbox with the reactor firing up, it was so badass
PS2 instantly comes to mind. It's the startup sound that's so iconic, it wins on that alone.
I think I'll go with PS2, although Gamecube seems pretty cool too.
The PS1, probably because it was my first. I thought it was a cool little touch back whenever I decided to boot up FFVII. The Xbox and Dreamcast ones were pretty cool, too.
I'm also partial to the Windows 95 & 98 startup sounds. I know it's not a console, but I still really liked those mellow tunes.