These are my two kittens, Duncan (grey tabby in center) and Dory (black tabby curled around Dunc), at about 3 months old. I adopted these guys from our local animal shelter when they were about 7 weeks old. I went there specifically looking for littermates, so that they could grow up together, and it has worked out better than I had imagined. They absolutely adore each other, and they seem to like us (their humans) even better than our prior singleton cats had.
Anyway, Dunc is a love who likes playing with his feather toy, being up high, and, most of all, being with someone.

Dory is more curious, likes laps, and would really, really like it if we would take her out on her leash more. I definitely recommend getting two kittens - they're wonderful!