Older chins can be just as lovable and easy to bond with as kits, and in fact, sometimes are even easier. With kits you have to have special spacing in your cage bars, be careful of too much wheeling in a little one, be even more careful of how you handle them, etc.
If you have the opportunity to go to a breeder, go visit. I always tell people not to have a preconceived notion of what type of chin you want, unless you just have your heart set on a particular color. It's really easy to run to the kits and oooh and aaah all over them, but just down the row there is a wonderful adult chin that would love to have a fantastic pet home as well. They tend to get overlooked though as, understandably, people are instantly drawn to the little bitties.