Yes, I agree with both Freedom's and Karen's posts. Some adult cats are very high energy so they love playing even as they get older. My RB Sunny was like this and my current 10 year old cat Sky is now enjoying being able to play with some of his younger brothers. When adopting a kitten, I say that two is better than one because then they'll always have a playmate around the same age and they should also get along well with each other. I adopted 3 kittens and none of them are related. Two of them came from the same adoption center and they were adopted the same day the third one was actually adopted the next day. I was a bit worried at first about introductions but they took to each other right away.

Since I currently have 10 cats, I'll tell you their ages and how they get along with the others.

1. Sky is the oldest and he's 10 and he gets along with all of the cats.
2. Pearl is 7 years old and she hates her younger brothers. She only gets along with Sky and Ziggy and even with them she'll still fight with them some times.
3. Ziggy is 6 years old and she also hates her younger brothers but she'll some times still want to hang out in the same room with them. Alani & Blaze make her upset though. She gets along best with Sky and Pearl but will also some times fight with them.
4. Alani & Blaze are 2 years old and they're littermates. They had to be adopted together because they're very bonded. They get along well with all of my male cats. My female cats hate them. I adopted them as kittens and my female cats have never accepted them.
5. Colby & Finnegan are 1 year old. They aren't related but they're very good friends and they get along well with all of the male cats. Pearl & Colby don't like each other and they'll fight. Ziggy will just hiss and growl at them if they get too close to her.
6. Radar, Reece, & Rory are a little over 5 months old. They get along well with all of my male cats. They really don't know Pearl because she's decided to live in my bedroom since she doesn't get along well with her younger brothers. Ziggy will growl & hiss at them if they get too close to her.

There's no guarantee that cats will ever get along but if I were you I'd try to adopt 2 kittens that are either already bonded to each other or who are in the same foster home and know each other well. If you want to adopt adult cats instead, then I'd look for 2 that are either bonded with each other or 2 that love other cats. You don't want two alpha cats so you need to make sure that if one is dominant then the other must be very mellow. For some reason male orangies seem to have the best laid back, mellow, and goofy personalities. This is why I now have so many of them. From my experience in multiple cat households, female cats seem to be more territorial and they don't do as well and this is another reason why I have so many males. I hope that you'll be able to find the perfect match. Good luck.