Hmmmm.
Well, with my original group (Carrie, Jack, Toby, Parsley and Sage) for the most part there was harmony. No real fights, just the occasional cuff from Jack to Toby to remind him he was "the man."
Carrie and Jack were pretty bonded and regularly found curled up together until their later years. Sage and Parsley got on well and while they didn't curl up together, they'd chase each other hell for leather around the house.
Toby was friendly with all of them, but was more a people person
than a fan of other cats. He was fond of me, but
doted on my partner.
The group now (Sage, Astryd and Darwin) is a little less plain sailing.....mostly because Darwin is a tiny furry ASBO hoodie in a cat costume.
He insists on trying to get the girls to play, especially when they want to the least. He's also going through the dominance stage, but he is very young so we're hoping with time it will calm down.
With both groups though, they would all sniff each other and touch noses so it could be worse!