My only question is why they had to spoil the awesome mad scientist Cid of XII with Al-Enrique Iglesias-Cid...

But if I had to choose a least favorite Cid, I'd have to go with II, XIII and VIII, in that order...

II: He had to get rescued with the Princess. I can think of a word starting with a G.
XIII: He's called Raines. Not Cid. He's a doofus. Enough said.
VIII: Something about him just whispers sex predator, I don't know why. I thought his inexplicable fondness of Squall was maybe because he was his father, but I was later proven wrong. And why does he have Seifer's card...?
Apologies if this has been pointed out already, but Cid Kramer DID design the mobile Garden, so in a way he is connected with engineering/airships/moving military academy vehicle things.