JLR >lol<
Ditchdwellers, I'm surprised you had that experience that long ago as well: it's all so silly because 'black' and 'white' - when used to describe mere things, not people - should not be 'loaded' words any more than red or purple or any other shade... Whoever tries to make them so, obviously has far too much time on their hands >erm<
Now 'burden', however, does have negative connotations by definition - Sunny, you asked about how differently people might see the word? My first associations are: 'unwelcome, heavy, tiring, nuisance, something to drop as soon as possible'!