Glad to find a like-minded individual here. I generally do either 33 for that half minute heat, 55 for when it doesn't quite need a minute, and 88, because after a buck thirty I should be stirring (if applicable).

We had an old microwave that had the button. It failed. I went and brought a new one home, and much to my wife's chagrin, as is in my nature, I failed to notice the lack of 30s button.