My first playthrough was Squall, Rinoa, and Zell because I was 10 and though that those 3 were the most important to the story. Not bad limit breaks though.

Second time was Squall, Zell, and Quistis. I found it to not be as useful as the above, but Quistis is nice to look at, so yeah.

This time I'm going with Squall, Zell, and Irvine. I've never been too big on Irvine but I wanna see what he's like this time.