Fascinating! I consume zero sugar (not even from fruit) and if I occasionally do, I don't feel different in any way.

When I used to eat sugar I did a few weird things (like drinking squash raw, without mixing it with water, I had no idea I was supposed to do that) but never felt different because of it.

When I was going to sugar was to cope with life / depression. It was kind of an addiction, not unlike alcohol.