We tend to teach the way we learn best. It is important that you take some time to think about how you learn best. That information will help you to better understand your strengths and evaluate the other styles of learning you need to address.
We tend to think of intelligence as a singular idea - book smarts. But that one dimensional idea leaves a lot of bright and talented students out of the loop. Intelligence comes in many different sizes, shapes, and forms.
There will always be students in your classroom that don't pay attention, that seem bored, that seem to hate you in general.
The reasons behind those actions and feelings could stem from a variety of places, but one of those might relate to your teaching style.
Sometimes problem students - the ones that act out, refuse to work, or become class clowns - might act that way because they have no idea what is going on. They may try to follow along, but when they can't, they might give up. In order to cover up a perceived flaw or stupidity, they may act out to divert attention away from their shortcomings.
Sometimes, kids just need to move around and get out of their seats.