Yes ,this is very common behaviour,especially in your SL beginnings-people ussually try hard adjuste avatar appearance to RL looking.
I remember how much time I spent ,searching eyes in that particular , blue-greyish colour , similar to mine eyes
I'm no t sure how old my avie is looking coz i'm changing skins so often-depends what mood i am in,
but my recently favourite skin seem to show me as 24-26 years old , I think
SL FREE fashion blog