I had known about gomashio ever since a brief flirtation with macrobiotics back in my 20s, and about furikake in general from readings here and there (including here on eGullet), but it wasn't until the other day that I picked up a jar for myself. Major yum! I can see myself eating a ton of this stuff without batting an eye. I've put it on brown rice and on garbanzo beans as well as on plain white rice, all to great effect.
The variety I got is Katsuo Mirin, made by Mishima/Shirakiku (for what it's worth, while the ingredient list is not all that short, the most artificial-ish ingredient of the lot is caramel coloring--the diet pop I'm currently drinking is much worse

).
My local 99 Ranch Asian market had a couple different brands in a variety of flavors, some looking relatively staid, some containing multi-colored candy-looking bits which I assumed were aimed more at kids. I get the impression that manufacturers just keep on inventing new and different flavors of furikaki, of varying degrees of inventiveness, like American breakfast cereals--would that be a fair comparison? (Given that there are also some cereals loaded with wacky-colored bits to entertain the kiddies, and other more sobersided varieties aimed more at adults). Are there some furikake combinations that are considered "classic" and/or traditional?
Also, what's considered a typical traditional serving amount of this stuff? I've read through the thread and seen that some people happily go ga-ga with it; but noting the Japanese preference for smaller food portions than we tend to consume in America, I'm assuming that the Japanese way with this stuff is similarly (relatively) restrained. Correct assumption or not?