My name! It was mentioned! And therefore.
Barthandelus is, thus far, the only boss I have fought that has required me to actually figure out a strategy. Perhaps this is mostly down to me loving to get my characters really powerful before fighting bosses (eg. getting max'ed out materia, getting maximum junction magic going on, using hero potions etc.). The other bosses I've fought in I, II, V, VII, VIII, X and XII all allowed me to overpower my characters should I wish it, and in the cases of at least half of them my characters were already overpowered anyway. That to me wasn't strategy, so yeah.
Zell was the best character for me gameplay-wise because when I think of gameplay, I think of battles, and he had the most interesting type of unique skill (button sequence attacks) and the most fun of that kind of skill (with Sabin it seems to not appreciate my input when it deals with diagonal directions, which is frustrating).
Terra is boring as hell. I have never come across a character I have cared less about despite clearly being a major player. I don't know why. She just never came across as interesting to me. She has an interesting background, yes, but background does not a personality make. She could be the lovechild of Kefka and Ultimecia and her daughter could be Quina but all that would mean is that those three interesting characters would have a very boring relative that links them together. As for her skills, all she does is turn into some Espery weirdness. It's the same with Rinoa, and I think it's the most utterly boring skill of any of the VI characters. I'm glad she's rarely forced upon the player.
Disqualify me from entering the next census? Hey, at least I'm not biased towards my favourite and least favourite characters. Aeris is by far my least liked character but I can still appreciate her gameplay value. This is a gameplay census that clearly suffers from favouritism. >=|
Balamb Garden is slow and does turn like a tanker. How is that incorrect!? Hey Jiro, maybe you should write for IGN. >=| We're talking gameplay, and gameplay-wise with transport all I have to go with is the way you actually get transported, and Balamb Garden was awful. I didn't even mention how fat it was. I mean, damn, if you're that big, surely - surely - you can knock down a bridge? But no, it can't get through small gaps and it apparently isn't strong enough to bash it's way through, either, which means we miss out on more gameplay rather than gain it. You mention the fight between the two gardens, but this isn't a case of transport-gameplay, this is the case of cutscenes and field-based gameplay that just so happens to be taking place on/within vehicles. It is not down to the gameplay you experience when actually using the vehicles for, you know, transportation.
I can't see your pie graph, but I think it just demonstrates not how wrong I am, but how wrong you are to assume that everyone else is right, when clearly I am right, thus making so many other people wrong.
Also, XIII would have got at least one more vote for best job system if it wasn't for the fact that TA, V and XI are all just amazing.