I think it's great you're considering adopting a cat from the animal shelter. I luv cats no matter what but it's a shame most people gravitate toward pet stores rather than a place where their fate is uncertain.
As for too many cats, I think it depends upon where you live, what the environment is, and if you are willing to spends some extra money and responsibility to each cat. We have a lady that hoards cats which irks me b/c she doesn't get them fixed so they multiply and spread disease to other cats. Ironically many of them have been taken to the Animal Shelter
I grew up with at least the number of 7 cats. My whole family are cat lovers plus we had a large labrador dog.
Funny you should say shelter, I was hesitant about getting one at the shelter not too longe ago because it upsets me to know that some of these cats are either going to be put down or taken into abusive homes. I wanted to get a companion for my other cat, Bob who is a socialite.
I don't regret it now that I did adopt Bill at the shelter. They told me he was probably the most likely to be put down because of his age which they said was 5. Most ppl adopt kittens. He looked sickly and full of famine until after some days. It was like looking at a different cat compared to the one I had seen at the shelter. And guess what? Turns out the animal shelter was WRONG, I had two vets approximate his age to 2!!
Here he is plump and happy. I can't believe what circumstances would've happened if I hadn't adopted him. He has so much character and charisma.
With character...Not to mention he's got a buddy.My sister's kitty is five or six, and he's a big huge monster of LOVE!