I lost horribly to Loz in that part when you control Tifa. I mean, I got lots of great combos, and I thought I beat him, and then he woke up and killed me!
Also, the battle against Bahamut was disapointing. All you needed to do, as Cloud, was to grab the others arms at the right time. I didn't even get to control the other characters for more than one or two moves!