I'm glad you like MyStuff2. There are a lot of features that you probably won't notice right away. Keep playing.
Just yesterday I greatly enhanced the Yes/No attribute functionality for the next big release. The attribute is being renamed from Yes/No to Toggle. You will be able to select from several pairs of values (Yes/No, On/Off, Thumbs up/down Emoji characters, etc.). This also includes checkbox type symbols.
I've also added a choice of two presentations. The current, two side-by-side approach, and a new method where a single button is used showing only the currently selected value. Tapping the button cycles through the two "real" values and the one "null" value.
BTW - to all of you who don't care for the current color coding please note that it is basically the same as any standard segmented control used in any iOS app. The darker segment is the selected segment. In MyStuff2 look at the one at the bottom of the Categories screen where you select Categories, Locations, or Actions. Same colors (though no colored text). I think the issue is with three or more segments it's much more obvious which is different than when there are only two segments. But the new option avoids any ambiguity.