I like it! Never heard that one before!
Actually, most, if not all, of the mnemonics that I've learnt have been a series of letters which can be strung together to make an almost-pronouncable word - things like BUMFICHH, HASELL, FREDA, CoPiLoT.... very boring, compared to your Tommy checks!
Personally, I like to use mnemonics for when I have to do checks while I'm busy doing something else. BUMFICHH, HASELL and FREDA are all used when flying the aircraft, CoPiLoT just as you line up on the runway. If I'm not busy doing something else, for example for pre-takeoff checks, I prefer to use a check-list. So I, personally, wouldn't use your Tommy checks. But they obviously work for you!
FFF
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