I probably have had more positive than negative experiences with drivers and pedestrians while bike commuting. Quite a few times, drivers have rolled down their windows while stopped at red lights and said nice things to me. Sometimes drivers wave or give friendly beeps. Little kids at bus stops or outside playing often wave and say stuff like, "Hi, Mr. Bikeman."

The people who yell nasty things or blare their horns seem to stand out because they are unpleasant interactions, but fortunately that doesn't happen very much on my commute. It probably helps that I obey traffic signs (usually) and I'm also very visible because I wear fluorescent jerseys/jackets and have a mess of head and taillights on my bike.