I was reminded of how pleasant the startup beep was on Apple II. The beep was pleasant, soft, and inviting. On the PC side, most motherboard would emit harsh shrilling beep, which sounds more like something had gone really bad.

While some would argue that such post-bios/boot beep is not necessary in modern computers, I disagree, especially on machines that do not have built-in monitors or on headless system. Sometimes, I am left to wonder if the computer booted ok. I sometimes have check the monitor/cable/etc... just to see if it actually turned on.