Favorite costume has to be either Lucy's coronation dress or Susan's archery dress. I love the colors in both.

Least favorite would likely have to be Lucy's dress at the departure scene in Prince Caspian. The color just wasn't very good on her and I didn't much care for the print.

It's really hard to pick, but I think my favorite dress might be the one that Susan wears during the hunt for the White Stag. The neckline is very pretty, and I love the embroidery and overall design. I also love the color combination; the green underdress peeking out looks so pretty against the purple fabric.

As for my least favorite outfit... hmm. At the moment, I'm going to go with Lucy's pink dress in Prince Caspian. I like the dress itself, I just feel that it being so pink hurts the design. We don't get much of a glimpse of it as it is, and even in the images we do see, you can't discern very much of the detail. I think it would have looked a lot better if there had been more colors going on or some extra embroidery. Susan's dress in that scene is a lot more eye-catching and I think Lucy's gown sort of fades away because of it.

Three of my favourite costumes:

- Susan's battle armor and chainmail in PC.
- Oreius' armor
- The White Witch's battle garb

I have to admit, I'm a fan of armor As you probably noticed
But I like Lucy's red dress in PC, too.

Least favourite:
Prince Caspian's farewell dress.

Oh, this thread looks quiet. I think I'll post on it.
So my favorite Narnia costume is definitely... Peter's armor, of course! It looks like it's straight out of the 1300's, and I have a thing for medieval stuff. (One of the many things that attracted me to Narnia, actually.) A close second is General Glozelle's costume. He looks so... commanding.
My least favorite is probably the thing that Miraz wears in a few of the castle scenes in PC. It sticks out really far in the middle, making it look like an ugly maternity shirt.

Actually, Miraz's shirt is quite historically accurate, and to the same time period(ish) as Peter's armor! Just a slightly different setting. Not only is it vaguely close to a Viking base tunic, but it's fairly close to the classic Knights Templar tunic.