i have a cat named leela. I keep it as indoor pets or 
I have a indoor cat as well. What kind of cat is that
I am not sure about the breed of the cat as we have over seventy cat breeds recognized by various cat registries.
What is the most popular
I do not know the most popular and i do not think people chose car based on breeds rather for their  companionship and for their ability to hunt vermin.
Are they naturally seeking companionship?
They have some qualities they have that are valued by humans, such as the fact that They can see in close to near darkness.
That is awesome. No wonder my cat can always fine me