I think it is lovely that you are even considering an adult cat...most people throw the idea away. My first kitteh was found in a ditch abandoned by her mama. She came home to me. I cant tell you how much those 20 years together meant to me. My second little monster was 3.5 when I adopted / rescued him. It took us awhile, but I wouldn't give up on him and he became my boy. I am his mama. He still has kitten-like attributes, too.

If I were to get another, I would definitely consider another adult...and if he/she came in a pair, all the better. They have each other for company.

Also, it is really important whatever kitty you adopt to make sure they are screened by a vet for the usual suspects (feline illnesses) and that they are the right kitty for your lifestyle (for instance, I have indoor only kitteh, so he is a short hair. Which reduces our brushing time and helps re: shedding).

Bless you. I wish you and your (new) furry family member all the best. There is nothing like coming home to lovies and furry fun