A child can not decisively pick which parent he or she will live with. However, if the child is at least 12 years old, then he or she can submit to the court a preference. The Texas Family Code says this exactly:
§ 153.008. CHILD'S PREFERENCE OF PERSON TO DESIGNATE RESIDENCE. A child 12
years of age or older may file with the court in writing the name of the person who is the child's preference to have the exclusive right to designate the primary residence of the child, subject to the approval of the court.
When they are 18.
Legal age to decide which parent to live with in the state of utah?
I believe it is 13-years-old.
I think that children of 12 years and more may decide to visit parents in Texas
When they are 18.
Age 18see links
age 18see links
When they are 18.
When they are 18.
In West Virginia, a child can decide which parent they want to live with when they are 18.
see related question, but if Texas has Jurisdiction, age 12.
The only states with specific laws addressing this is Indiana and Texas. Beyond that, they simply have a right to express and opinion.