Is the host family American or German?
Tastes do vary widely and I will be honest if you don't mind. NHDisneylover discovered for instance that peanuts are to our tastebuds a savoury, not a sweet. Very few chocolates have peanuts as a result and they are often not to people's liking. Peanut butter is more common now in the stores but many people still don't understand it; almonds and hazelnuts are the 'sweet' nuts here for chocolates.
And as you learned, we have a different preference for sweet things and find some things too sweet. Just different tastes.
I would bring something specific to your home for instance - even a nice coffeetable book would be enjoyed, as the scenery can be very different. That is also easier and safer to pack. Or if you are from the Detroit area then maybe a history book like about Henry Ford, or something from the museum there. My friend from Detroit always has interesting things like that to show me.
Ironically, the one thing that I always like to buy in Michigan when I am in the western part of the state is Julius Meinl coffee which is from Vienna! (Not that I would suggest that, but I was so surprised to see it sold there)
Another suggestion would be
local chocolate or treats. A very nice former poster and her husband once gave me a very large gift basket of local Michigan chocolate and treats and that was very much appreciated. If I recall, it was a local chocolate company and a local nut company. But again I would try and avoid the peanut as sweet, and the fudge.
And I never developed a taste for any of those other candies people listed; again, not a criticism, just different tastebuds from what is the norm for us. Same for anything maple flavoured.
(I usually agree with NHDisneylover on most things, but I guess not today!

Hopefully she won't hold that against me)