Fluffy B is the easy one, D Sqn used to be fairly unpleasant and hardcore, and C Sqn was a nice middle ground. C Sqn probably had the best crewroom. Pick your favourite mascot; B has a tiger and lots of Calvin and Hobbes-themed t-shirts and the such; D Sqn has a dragon, and lots of horrible mint-coloured clothes and quartered rugby shirts, while C Sqn has a dolphin and navy blue stuff.
We always reckoned the dragon would win a fight between the mascots, although dolphins are clever enough not to get involved in a fight with a dragon and a tiger. And tigers don't swim too well, and fire's no use underwater, so if it were in the dolphin's home turf he'd probably do quite well.