All the machines I had!
It would be hard to choose between A500, A1200, A3000, A4000, A4000T... I would choose my current A4000T
I loved my A500 but I didn't like the lack of IDE controller and some more ram would have been handy
I liked my A1200 and looking at the past it has been one of the best Amigas because it was cheap, featured an IDE controller and you could add memory more or less easily.
I liked my A3000 but OCS after having used AGA was simply crap. I couldn't live without my dear demos and leaving my Falcon 040/25 for a crappy 030/16 was not a good idea.
I loved absolutely my A4000. I missed the extra speed and extra ram of the Falcon040 accelerator, but it was a rock solid computer, everything was tidy, I could fit CDROMs inside and various hard drives and the best was about to come... graphic cards&scandoubler! With the CV64&scandoubler it absolutely rocked!
But I jumped to the A4000T... then Picasso4 and CS060MKII came. It was a great system, and when I got the CSPPC it was a monster. Now that it's fixed I love it and I'm very happy with it
It can run everything from old OCS games to AGA 060 demos and also OS4, MOS, Linux and also MacOS through emulation... It can run past, present and future amiga software
I like my A4000T-PPC more than next gen solutions.