Dave,
I know you're a grown ass man and don't need simple reassurances like this, but my coworkers and I watch your blog at work and I do at home, and we like it the way it is. As somebody before mentioned, there is a fast-forward button for a reason. I don't care for the mailbag segment myself (blasphemy!) so I typically skim through it. There are sometimes gems hidden in those episodes, so I still give them a shot. I much prefer your fundamentals topics, or your detailed "in the weeds" analyses, precisely because you are the only person I have found to do it so well. I have had to watch certain videos three times to understand the material, and THAT'S GREAT. It's not overly dumbed down. It requires some effort for the uninitiated at times, and that's what keeps me coming back.
Your mannerisms are quite tolerable in my opinion. I hate listening to people who have long verbal pauses, make throat noises, swallows, etc every two seconds, mouth clicks and lip licks, oh man it's so irritating. Also when people spend 15 minutes telling you what they are going to cover before they get started. I like how you say "Hi!" and just jump in, maybe a 30second overview and its time to dive in. And it goes without saying that your periodic use of swearing adds a lot of "real person" credibility with many, including me. Unfortunately, we swear like sailors where I work, and are generally suspicious of anyone who is robotic and overly politically correct, assuming they are disingenuous and fake.
I just wanted to bring these points up in case you are feeling like, "Man, a guy just can't win with these people!" Yes, you can, and you are. Just keep on keeping on, and let the fringe viewers stew in their venom. The rest of us are quite happy and appreciative of what you do.