Summons are always my favorite thing to see, in any of the games. I always go out of my way to get all of them, and in FFXII, that was a bit of a task, but it was worth it! Those things were awesome.

I dunno how much I like the whole transforming-mecha feel to the FFXIII ones, but they do fit in better with the overall atmosphere of it. I think it's just the evolution of the setting that deviates from the "traditional" design.