I personally enjoyed the summoning system in FFX most of all FF games. I was never really fan of summons being basically more expensive, stronger spells.

I liked the fact that they stayed in the battle and I was able to command them. Teaching them multiple abilities, them having special skills (Shield/Boost) etc.

Not to mention my very first playthrough when I was what... 10? Was pretty much aeons based.

Stuff like this: https://www.youtube.com/watch?v=wfNx6sU5pyA is super sexy imo.

So what about you, did you care for aeons at all?