The most useful corner cabinets are 90 degree ones that are at least 36" in both directions. Whether or not you add in a super susan is up to you, but that also increases the utility. Doing an angled corner cabinet decreases the usefulness of the corner, and it increases the expense and difficulty of your counters.

You would get better feedback on your kitchen if you posted a complete diagram of the space.

Here's a rough sketch. The upper left corner has to be 90 degrees because of the two different counter top materials. That just leaves the upper right. I was thinking of putting an angled corner, with the microwave on the counter, possibly semi-built-in. Angling the corner would give me enough counter depth to do that and still have space in front of the MW. BTW- There won't be any overhead cabs, although I might put some on the refrigerator wall if we find we have the need. All of the lowers, except under the sinks, will be drawers.

I'm building my own cabinets and concrete counter tops, so added complexity won't cost me anything other than a few (more) gray hairs.