VapingWithTwisted420 is the most relate-able to me. He buys all sorts of clones with his own money and gives honest consumer reviews. He's helped me decide on pretty much all my gear that I'm running (which are all clones). Plus he's the most entertaining to watch IMO.
RipTrippers is the go-to guy for builds and just keeping up with all the latest and coolest vape gear. But considering he gets most of his stuff for free, I find it hard to believe it when he says something like "Would I buy this with my own money? HELL YES!" for nearly every mod and atty that he's reviewed. Do people really have that much money set aside for
vaping? He reviews pretty much only authentic gear with the occasional clone vs authentic video which I find the most helpful besides his coil build vids. So unless his video is dealing with a clone or a build, I'm only watching for entertainment purpose.
Pbusardo's videos are the most informative videos I've watched when it comes to vaping. But they're always incredibly long so I only watch them when I feel like popping some popcorn and bundling up in my chair

.
GrimmGreen's videos were the very first videos I watched when I started vaping. He helped me decide on the MVP2 before I found the ECF forums. However, I don't like how he makes his videos one long cut leaving you to watch him crawl around trying to find a screw he dropped or adjust the camera because the sun came out in the middle of the video. He makes good points in his reviews, but a lot of the products he reviews now aren't what I'm looking for. I pretty much only watch his videos for entertainment now too.