The 737s are probably the easiest!! We have about 7 zones for seating Oa to Og. As the trim section is very wide it is fairly easy.
Keep it simple. Start off with a round figure for the bags in Cpt 1 or 4 and then "fine tune" with LMCs. i.e. First 50/60 Bags in Cpt1 and the rest in the back. Makes the loaders life easy too.
Tricky ones are CRJs as there is only one Cpt and with light pax load or a bias to Business/Economy it can be a mess. Ballast is usually the answer.
The A300 can pose problems due to the numerous containers. So trying to sort out baggage numbers and loading positions plays silly tricks on yr head.
Get a feeling for whether an aircraft is more tail heavy or nose heavy and what kind of influenec the fuel has. On some it has a small effect, on others its more pronounced.
Best of luck!
