Having said that, I agree that what else your ingesting with the cannabis, in whatever form, has a big effect on the buzz. The biggies being caffeine and sugar.
Yes, weed and caffeine, the hippie speedball.
On topic, I also find edibles ineffective, but that's my response to THC in general. I have a massive tolerance. I'm always amused when someone warns me, "careful--that's two-hit weed" or some such caution. With really dense vapor I can experience brief euphoria, a quick green-out, then it's back to my regular mellow. This isn't a complaint; I like my baseline to be full saturation.
I will eat it if I need to go a long period without vaping, just to keep from getting bored, but I have to consciously remain active, or it tends to make me sleepy, which isn't a problem with vaping.