A friend of mine recently started cutting it out of his diet completely. He says he feels much better having done so.

I've heard nothing but bad things about the stuff myself, although I think I'm a lot less sensitive to it than you are. There was a point a few years ago when I completely gave up all sodas and moved to diet iced teas and water, and I didn't notice those kinds of differences (just decreased heartburn and indigestion).

Overall I think I'm able to stay away from HFCS. It's only because I eat other crap that I'm overweight