I definatly think that Rikku and Tidus and Yuna have the coolest outfit. Here are my ranks of FFX character's clothes.
1. Rikku: I love her shirt and her fingerless gloves ^^ Im looking for gloves like that . And her al bhed googles are cool!
2. Tidus: I love his yellow jacket and shoes!
His Pants are awesome too, how they are big on one size and small on the other.
3.Yuna: I love her halter top shirt and skirt but the thing i like the most on Yuna are the things on here arms. I love how they go white to pink, like an orchid flower ^^ The only thing i don't like is her bow around her waist.
4.Lulu: I like how her the top of her dress looks but the belts are kinda creepy. I like her braids
5.Auron: I like the red jacket and the sun glasses
6.Wakka: His hair is kool because it defys gravity but thats really it.
7.Kimahri: I can't think of anything I like besides his blue fur ^^
Thats all!