My personal preference is Fuji brand. I find that it has the brightest colors and makes those beautiful blue Florida skies and the bright greens and reds of the vegetation POP right out of the print.
By comparisoon, Kodak is crap. In 15 years of taking pics at WDW, I have never gotten a picture with Kodak film that didn't turn the bluest sky gray and make the sunniest day look overcast and dreary.
The reason for this is that Kodak film is specifically balanced for human skin tones, to smooth them out and make them look less red and blotchy. But this also mutes and washes out the brighter colors, which ruins outdoor WDW scenery.
Fuji, on the other hand, is balanced to make the brighter colors pop. No other film I've ever used makes the WDW colors look so bright and sharp as Fuji.
I use 400ISO for almost everything. Fuji 400ISO does a fabulous job in the bright Florida sunshine (as long as you have a camera that's smart enough to close down it's aperture), but is fast enough to get excellent indoor pics, either with flash or by long exposure.
But the best thing about Fuji film is that it's WAY cheaper than Kodak. Go to
WalMart or Sam's Club and get multi-packs of Fuji 400 for 20% less than comparable Kodak film, and take much better pics with it, too.
Also see my web page for tips on safely flying with film:
http://willcad.org/image_film_tips.html