I like how fast and responsive is my Amiga 1260. I use a Compact Flash as a hardrive to store my programms, docs, saves etc. but everything else is done in Ramdisk, so it's very fast.
I remember 10 years ago, as a student, I was working on a project with Macromedia Director (on Mac) at the university, and I needed an intro scene for my project, so I decided to use Lightwave on my Amiga to make a CG intro, and I was amazed by the efficiency of the OS multitasking.
It was totally crazy, each frames were saved in the Ramdisk, then, while Lightwave was processing an other frame, I was making an image conversion on ImageFX (from 24 bit IFF to 256 colors GIF) and saving on a SCSI (the Blizzard 1260 SCSI module) Iomega ZIP 100 the frames once converted. All this during almost 20 hours without any crash, everything ran flawlessly ! :-)
