Spliffs/joints for sure. Not the most efficient or healthier, but it's the most enjoyable way. There's just something about the ritual of it, from grinding and rolling to lying on the couch and smoking it slowly while listening to music or watching something.
It's also the most social way, you can share it if you want, or everyone can roll a personal and light it at the same time.
I've tried pretty much everything, I currently own a pretty good vaporizer, a bong and have owned plenty of pipes and bubblers in the past but they just don't provide the same experience as spliffs.
Although I don't really recommend them for everyday use because they're pretty addictive and unhealthy, mainly due to the infamous tobacco.
Edit: Oh and edibles are nice too but it's an entirely different experience, might as well be a different drug. I also really like vape pens because you can hit them everywhere, but I rarely use them since weed is illegal here and I wont buy them unless I'm 100% sure they're good quality.
Otherwise dabs are the best way to get super high, definitely the most intense way to consume. I would dab more if I had access to quality concentrates (ideally rosin or extracted with CO2).