While each breed has a distinctive personality there's a lot of variation within that profile. I have Abys and they tend to adhere to what people expect of them although one is happy and cuddly all the time and another can be really cranky and difficult when he wants to be. You can't pigeon-hole them too tightly.

The more active breeds (or just plain active cats) may eat more than a sedentary cat just because they are burning off more energy and need the extra food. Abys eat a lot but stay slender (until they get older) because they are *really* active.