I agree and congratulations on doing so well with your channel. But, I would say that there a few small things that you could improve on since you're asking. I was watching your video "5 Ways to Make a Guy Like You" and firstly I think that's a great topic, especially since a large portion of your audience is female. I feel like the video was well thought out, interesting, and what you were saying made sense. But, maybe you can add in some other elements to your videos to make them a bit more entertaining. Maybe like an intro/outro, or background music (there's a lot of pretty good royalty free music that you could probably use) and some more complex editing. Like cut scenes, different angles, etc.
I feel like you have the right foundation to build on and really take your videos to the next level. It also helps that you already have a pretty big audience.