Rosh chodesh is not a holiday since you arent celebrating anything. there is no reason to be more happy on rosh chodesh since you have no clue why you are doing it. I think it is a violation of emes for you to due anything special on rosh chodesh with anything in your mind besides either “this is what the misjnah brura says to do and i must do it” or “this is fun”. Its kind of like beating hoshanos on the floor as we say in the yehi ratzon- “al yidei chavitas arava, minhag niviecha hakidoshim” the neviim said to do this and we do it but dont ask me why.
