For me I got into CLI which was similar enough to MS DOS (later on). I positively hated Mac for not being a tinkerer's box.
Using an Amiga, even just fiddling with the icon editor or startup-sequence was an enjoyable, relaxing experience.
I remember the good sport of: Making fun of PC users with their CGA graphics and monotone beep sound.
Amiga got me serious about computers. It was a computer you liked using and wanted more of.