Baxinger?!? No accounting for taste, I guess but damn that toy sucks. Here's why:
And it is for this reason that I really can't get into any of the other aforementioned designs. All of the early combining transformer toys needed piles of extra pieces in order to work. It was a pain and has always seemed like an engineering cop-out to me. I don't mind so much when you have to discard pieces, though. I guess that's why I like Tomy's Eldoran line so much; from this springs Great Ganbalger which, at 16 inches, towers over every other combiner out there.
Takara put out some great combiners from their Brave line. I personally dig Great Goldran and Super Build Tiger (which kicks Devastator's ass).
If we're talking vintage, I'd have to go with Takatoku'sBig Dai X and Bandai's Voltes V and Diarugger.