Last time i did some coding in forth, it was Fig-Forth on the 8-bit Atari 800XL. It was really fun and I was amazing on how fast it could run despite being in such limited hardware.

I would say Forth is easier to use than assembly, and perhaps much more flexible/extensible than C, although in some senses lower level since C gives you a very nice, ordered way of specifying what are the arguments to your functions/etc.