The key things for me is the kickstart, not needed to load the full GUI to play a game makes it like a games console to use yet with the full power of a PC when you need it. (Internet, word processing, etc)
Also the fact that amiga drivers are named simply, letting you know what they are just by looking, IE: Audio.device, scsi.device, ioblix.device etc.
It makes the whole system easy to manage, you know what file does what just by looking at it.
Other than that its just small, fast and well designed.
