I've always liked the way an Amiga feels, tactily that is. The physical feeling of resting the palms of your hands on front of the keyboard, to typing on the keys, doing the "reach-a-round" on an A500 popping disks in and out, placing your index and middle fingers on the top/side of an A1000 and using your thumb to pop a disk out, to the feel of the original 2 button mouse... list goes on and on that way. Then there's the familiar and comfortable idiosyncrasies of the OS. Performing tasks, using the CLI AND Workbench together, dragging windows and screens around, et al.
Other computers, especially the C64 and Apple ]['s have their own tactile feel which I can appreciate too. Earlier Atari 8-bits are nice as well, but the ST always had a "cheap" feel to me. Plastic seems more brittle or something and the case design (keys too?) seems to have sharper edges and are not as comfortable to use.
Bottom line: the look and feel of the legacy systems are what makes an Amiga an Amiga to me. New hardware and cases with generic mass produced Chinese input devices running "modern" Amiga OS's or Amiga-like OS's are NOT real Amiga's. As "cool" (and frustrating) as they may be to putz around with for a while, I just can't get into them which is why I've always gone back to legacy hardware running 1.3 or 3.1 before too long.