I haven't used ISO 100 color film in twenty years, mostly because most drugstores don't stock it. I like the ISO 200 Kodak Gold, but I make my readings very much biased toward the shadows with an incident light meter. If I took a refected averaging reading I suppose I'd be setting my meter at 100. Anyway, the Gold series of Kodak's films are really designed for people who don't have a clue about things like color temperature or what "correct" exposure is. It'll handle anywhere from a stop of underexposure to several stops of overexposure, and give "acceptable" color in just about any mixed lighting situation. It handles daylight situations nicely (5,000K to 6,000K), doesn't go completely orange in tungsten room light (average 2,850K), and compared to the earlier Kodacolor films doesn't seem to go really green in flourescent light, but some of this may be due to the improved spectral output of modern flourescent tubes.
I don't know what Kodak's current target is for response to color temerature of Kodacolor (Kodak Gold) but for many years the Kodacolor films were balanced for clear flash bulbs, about 3,800K, which put it smack dab in the middle between tungsten room light and daylight, hence its color lattitude. Pro wedding and portrait films, such as the old Ektacolor CPS, Vericolor VPS, and today's Portra, are balanced for daylight/electronic flash, and are low enough in contrast to hold detail both in the shadows of a tuxedo and the highlights of a wedding gown while giving good flesh tones.
Lastly, I like the idea that I can go into any CVS, K-Mart, Walgreens, Walmart, etc. and find 4 packs of 24 exposure Gold 200. If I check the ads in Sunday's paper I can usually find somebody who has the stuff for $5.99 or $6.99 and I stock up.