Suppose as the OP I should answer as well.
At home, it's changable, but my current routine appears to be a slice of toast with peanut butter (crunchy, with reduced sugar if possible) and a glass of milk (and a requisite glass of water as well to wash it all down). When it is available, sometimes I will also have some yoghurt.
On the weekend sometimes I don't have breakfast and go straight for lunch, especially if I'm only going to be at home. Sometimes someone will cook up eggs etc. or noodle soup for breakfast on the weekend. When we have guests we'll typically some time make pancakes or scones.
Whilst on the road, if my hotel provides breakfast with compliments, I will usually have that, with hot breakfast preferred (especially eggs), and usually I will have a tea or coffee as well. If fruit juice is provided I'll usually take an orange juice, especially if it's freshly squeezed. Without a hotel breakfast, I'll usually venture out and grab something like a sandwich and juice, unless there is somewhere which provides a nice breakfast nearby. If I'm in a non-Western dominant culture, I like to try and eat / sample the local breakfast fare (e.g. in Japan, noodle soup or miso; in Chinese cultures, dim sum or mantou; in Malaysia, nasi lemak; etc.), whether this is in the hotel or outside it.
I'm not big on continental breakfasts but if it's free then it does the trick. If it isn't free, it's typically not excellent value at all, unless it's DIY by going to the local supermarket. (Euro cold breakfasts are not like "continental breakfasts" as there are usually cold cuts, a nice selection of breads and cheese).
On the company dollar I'm usually not in a chain hotel and thus breakfast is expensable and I'll usually go for a wholesome but middle-ish priced meal. On my own dollar without complimentary breakfast, I'm a bit more frugal, and will try to make a judgement as to whether I'll eat a large breakfast and very small / no lunch, or vice versa, or have a decent sized both if there is a good valued breakfast around.