I think any weather also affects how far you can move through water while its raining. Ever notice how when its raining you can only move 1 space through water, and some characters can't even enter it?

Well then, I would never use most of the abilities already said and,
Defend! - Its always funny to see an enemy using defend, wasting 20 ct points every single action instead of just waiting. Sure the extra might come in handy maybe in some rare cases.

Gilgame Heart, Caution - I could go on, but I have a feeling I'll be naming every single ability that isn't auto potion, or move +3, and so on.

I have an idea people - if any of us happen to live near each other, we can have contests, such as: 2 tv's hooked up to 2 playstations in a room, both with final fantasy tactics in them ready to go. Two people bet a certain amount of money, and then someone plugs in the extension cord, giving the systems power, so they can both begin the game at the exact same time. The two people then race to see who can beat the game first!! It would be the ultimate fft marathon. Anyways I'm in NJ, send me a pm if youre nearby.