I agree that they all have different personalities. Back when I only had 5 I knew how each one extremely well. I didn't do everything with them but I did spend 5-10 minutes discribing their different personalities to a friend. Now I don't know them as well because 1.) I have more and 2.) I've been working more. Every snake is different.
If housing them together works for you and them then all the power to you. I know how fustrating it can be when they don't eat, I have a small female currently on a one month hunger strike.