I don't miss getting kicked off the internet every time my parent's needed to make a phone call. Or that annoying popping sound the speakers would make when an old cellphone was in use nearby
Oh ive got one, having to make a custom config.sys and autoexec.bat to turn off optical drives ect so you can free up enough conventional memory to launch your games in dos, as well as having to fix IRQ's via jumpers when changing hardware.