You can't really call it a trade as such. Its the only branch in the navy thats lower pay band from AB to Chief! I've known handlers who get excited about hoovering out the ring-bolt holes in the flight deck.
The FLT driving/Firefighting aspects might be considered interesting, but the rest is fairly humdrum. However, none of the handlers I have ever known have ever wanted to change jobs, and apparently it has the lowest rate of notice giving in the navy. the upside is, I suppose, the pleasant, stress free upperdeck outdoorsy life. In the AH branch, if you get to PO in less than 12-15 yrs then you are a high flyer. On smaller ships such as frigates and destroyers the job of the aircraft handler is done by a small hydraulic trolley. There is talk of putting the trolley on the higher pay band.
All of the above is of course, personal opinion. Please consult your nearest AFCIO
Awaiting incoming from the NA(AH) community