The Motorola 68000 family was very much like a PDP-11 with twice as many registers, and 32 bit ones at that.
I cut my teeth on an IBM 1130.
The only PDP-11s I worked on directly were LSI-11/23 boxes -- one was in a Tektronix 8550 development system around 1982 and the other was the company main computer used for everything from secretarial memos to engineering software cross-compiles. I managed to snarf a copy of Colossal Cave Adventure (ADVENT) for the Tek box and after hours would reboot the box in RT-11 and run Adventure until the wee hours... ("You are standing at the end of a road before a small brick building...")
I loved programming the 68000. What a lovely, symmetrical, easy to work with CPU. Got to write driver code for some handheld devices (based on a Dragonball CPU with a 68K core), only for half a year or so, but it was fun while it lasted.