Just to add my own flaming:
I have been lucky and had the oportunity to test all the Amigoid OSes
-MorphOS is slick and fast, but I dont feel at home with it. Blame me, the old schooler.
-AROS is a great concept which has evolved greatly during the last years. It has become a tempting alternative.
-AmigaOS 68k is an oldie goldie. The true thing. I love it, despite its drawbacks. I enjoy tinkering with it. I will never leave it.
-OS4 was a huge dissapointment for me. I expected an improved 3.9 experience, and I got an incompatible, unstable and downgraded one. And I am not talking about its hardware! It could have been so great, I was expecting it with open arms, but well... they run short... so short.
BTW The Earth is a boing ball!