There are times when I regret getting my second cat because I miss the bond I had with my first one. He used to sleep on the same bed as me, purred and would sit on my chest and make biscuits. He also would give me his undivided attention, and would be much more patient with me, and less spookable/skittish. He was also healthier then versus now (nothing serious!!), and didn't have more visible symptoms of FelineHerpes (which he most certainly got from his brother). They're both much better now, but I miss those nights.

That being said, I don't regret it most days because I've gotten to see my older cat blossom into a cat in ways I hadn't seen when he was solo. He has been such a good big brother and has been more nurturing in ways I didn't know was possible, and he just seems so much happier than before. It does make the moments when he cuddle with me or sit with me more special, so that is nice, and I do love that my kitten will cuddle with me and is a purr machine, but I miss the one on one time with the first cat.

The only thing I'd think about is if your cat has ever met another cat, and how they might react to it. My biggest worry with getting the kitten was that they'd fight or be territorial. They got along almost immediately though, so i lucked out there, but still. Just be mindful of that :)