When FF7 came on to the game scene, I was blown away by the amazing Summoning sequences. BTW, Listen to the bad Midi reproduction from the PC version in this clip.
Note: I know about the Choco/Mog one, but I would randomly get the Fat Chocobo summons too. Anyone remember this?
Hades: This one was just cool.
Bahamut Zero: I love how this one goes into deep space and Zero appears in orbit around the planet and rains down a laser beam on the bad guys.
Typhoon: I have never seen this summons ever, and I've played FF7 for ages. How do you get this guy? I like this guy's attack.
Knights of the Round Table: Total kick ass-ness
Odin: Probably one of my favorites period. He just has a kick ass intro with the moon in the background. You have to see Odin in part one. (What's up with all the moon shots in FF7?)
Note: I had forgotten how big Tifa's boobs were. Forget Tomb Raider.