Whichever method people wanna go with, try to be consistent within their own method. e.g. Devastator (G1): does he count as 1, 6 or 7? Up to you, but I reckon whichever rule you choose should be applied across the board for all your gestalts, regardless of whether you purchased them individually or in a single box set. Maybe if you keep the box sets sealed... but otherwise if they're opened, I say count 'em all the same way.
Yeah, I suppose for insurance purposes you might want to catalogue them like TFU.info does... Sixgun, Scamper & Slammer aren't counted separately from Metroplex, but the page on Metroplex clearly lists/documents every accessory that he comes with - those robots, the building bit, the missiles etc.
UCM counts Mini-Cons separately dude (Article03). As you said, Mini-Cons have independent play value... you take Jetter - on his own he transforms from a robot into a supersonic jet. He doesn't need any other Transformer to be enjoyed with as a Transformer toy. The fact that he can merge with the rest of his team to form the Star Sabre and Powerlink with Autobots/Decepticons is a bonus feature.
Heh, I used to use the Sentience method too when I was a kid. (back when I maintained a checklist on a Commodore 64, then later a 286 PC (with a VGA monitor! Made me the envy of my friends who were still using CGA and EGA monitors... then my godbrother got a Super VGA monitor and blew my mind away ) *rewinds.tape*
Agreed. You'd have to be pret-ty desperate to jack your collection count up to count those separately IMO. I couldn't be bothered making a poll about that set because there's only 6 of them - and considering that results are rounded to the nearest hundred in the primary poll, it's not really going to affect the results. There are gaps in the UCM like this where stuff slips through - but the numbers are so small that they wouldn't affect poll results anyway.
Hmmm... but are Action Master weapons/vehicles sentient though? My understanding has always been that they're not... at best they may have advanced A.I. but aren't actually sentient/self aware (at best they might be like say Jarvis in the Iron Man/Avengers film franchise -- artificially intelligent but not sentient).