I dont know the values of your pencils and assume your #2 pencil is the same as the HB we use here
I do use pencils every day and it is always my starting point when i start making a stick.Even at this stage i do tend to use shade on the drawings its force of habit with me ?
But there is a noticable difference in the grades of pencils it gives depth to a drawing when used as tone . They say its possable to get 141 different shades from a pencil i doubt if i can achive anywhere near that,
Th f and h grade pencils here are used by graphic designers etc.
I am in the old fashioned school prefer to draw than use the computer
this shows the toneal differance between 3 pencil grades hb, b and 2b hope the picture is good enough