I am 31 years old and thinking of perfecting my teeth with Invisalign. Am I too old to wear braces/move teeth? (photos)

You're not too old to straighten your teeth.  Teeth move in adults just like they do in children and teenagers, but sometimes can be a little more stubborn.  It's hard to tell from your photos if you are an Invisalign candidate, as I can not see your bite.  It certainly looks like the crowding you have could be resolved with Invisalign.

Dear Sir, you are only 31 with mild to moderate crowding. The teeth are white and are not worn down, so there is no need to cover them with veneers.Your teeth can be easily straightened with Invisalign and then there will be absolutely no need for veneers.