There are certain characteristics of the various different skin types and most people fall within either of the main categories.
To determine what type of skin you have you need to look at the characteristics that you possess.
For normal skin you would have a medium to fair complexion as would be expected.
If you spend time out in the sun you would tend to burn initially however provided you aren't exposed to the sun for extended periods you would also develop a nice natural tan.
Your skin around the forehead and down your nose and across your chin will tend to have slightly larger pores and this area will also be more susceptible to skin irritations and acne although people with normal skin will have far less problems than those with other skin types.
The skin on your cheeks can have a tendency to become a little dry but it certainly won't be a problem in most cases and the use of a good moisturizer will eliminate this, although once again people with normal skin generally have good supply of natural water content in their outer skin that will help it to remain smooth and supple most of the time.
Those fortunate people who have normal skin will also feel a slight tightening of the skin across their cheeks when cleansing the skin.
As people with normal skin age, they will see fine lines appearing around the upper lip, forehead and around the eyes.
While normal skin is generally the easiest skin to 'maintain' there are outside factors that can cause problems such as the weather, working environment, the sun and all the other factors that would affect other skin types.
If you happen to have normal skin then consider yourself lucky but don't fail to treat it well with good cleansers, moisturizers and toners to ensure it stays in good condition for as long as possible as you age