I have the same experience: I first learned 6502 (Apple II), then 68000 (Amiga), and finally (x86). The 68000 was very straightforward in the number of registers and memory addressing. Mainly when you compare with an 8088.
I learned assembly for ARM2, loved it, moved from Archimedes to PC and pretty much immediately went "oh my word what the flying fornication NO" and have basically never written assembly since.
