@adolescent:
It could be related to my rev 1.5 motherboard perhaps. I am not sure. My tests were conducted with A600 rev 1.5 mobo, 3.1 rom, 2MB chip / 4MB fast ram, OS3.1 installed on the hard drive.
I can confirm that a lot of working games wouldn't exit, and a lot of wouldn't work at all (and yes, I know that I need to tweak the tooltypes when trying WHDLoad games between different Amigas...e.g. tooltypes that were good for A1200 don't necessarily work with A4000 with 060, etc.). :-)