What do you enjoy about working in cargo for an airline?

Marla - I don't work in Air Cargo, but I do work in aviation and have since 1967 when I went into the US Navy.
There are so many different types of jobs that need to be done in the airline environment. Once you get your "foot in the door" then all kinds of opportunities will open up for you. I have seen people who start as cargo loaders, etc and go on to be dispatchers, pilots, Mechanics, etc. I am basically a Mechanic and just enjoy working on airplanes. Large aircraft (i.e. Boeing, Airbus, etc) are very complex, will usually specialize in one area of maintenance, (i.e. engines sheetmetal, electrical, avionics, etc), and take years of experience to learn all about them, (if you ever do). Small airplanes, Cessna, Piper, etc. are much less complex and you will work on most systems. Air Cargo is one of the jobs that don't require a government license and is usually a job to get your "foot in the door" spend a year or so with the airline, then as different jobs open up apply for them, if you meet the minimum qualifications, or just work in air cargo.

I have flown as flight engineer on passenger as well as full cargo version of B747 and have seen the airline cargo warehouses where specific size pallets are prepared before
loading those pallets into the main deck of the full cargo version of the aircraft.

The cargo is delivered by the preapproved and prescreened cargo customers who are required to deposit the cargo along with cargo manifest and certification that cargo is
not dangerous and is packaged as the government prescribed safety rules . These packages large and small have to be delivered many hours before the scheduled departure of the cargo flight.
The airline cargo warehouse staff then check the cargo for safety rules and weigh them and then group the cargo pieces as separate virtual pallets according to computer program and then send these pallet making instructions to other pallet making staff who are certified forklift drivers as well, collect cargo and place them over the pallet surface and make a cargo pallet according to weight and size that would fit in the aircaft main deck.
Once all these pallets are prepared, then they are assigned number to be placed at specific location on the main deck of aircraft.
These pallets are placed on trolleys and driven to the aircaft and loaded in proper sequence on the main deck after Tail jack is installed on the aircraft.

Loading the aircraft is mechanized and has to be done very carefully

All this job is very specialized and rigorous. I have seen ladies working on computers making loading plans and completing paper work. Most of the cargo flights leave major airports like LAX, JFK, ORD i the middle of night because Take off Slots are only available during night time, leaving more time for passenger flights to depart.

So working in the cargo section of the airline can keep you separate from rest of staff who work day time. You need to be a night person and a person who do not mind working in noisy environment. You need to be rough and tough wearing overalls.

If the pay is good and you like to work during night times and in open areas, then you may consider working there.