I am 24/7 by choice-- on occasion I leave the diapers at home (like when visiting relatives etc.) The thinner Molicare super plus and a good onesie pretty much all the time these days, and a thick one for overnight (disposables) although I have been through many phases of being diapered.
My diaper USE, however, is probably summarized as follows:
Incontinence-- I have developed a "respectable" bed wetting habit (respectable in the ABDL community, that is!) I have, on occasion had a couple of uncontrollable messing accidents, mostly day, over the years.
Urge-- At times I have had what might qualify as urge incontinence (wetting), particularly when using heavy diapers that encourage unabated use.
Selective Control-- At other times my diaper habits are more suited toward using selective control-- wearing thinner diapers during the day and when convenient for whatever social situation I was expecting (and how I needed to dress etc.) Additionally, in this mode I am still deciding when/ where I go, and even if I go. (Say, opting for the potty when I do not feel comfortable while at a client's office and risk having to show off my wet pants from an overflowed diaper.) So, I'll either use the potty or wait until I am alone and/or sufficiently able to handle it. This is perhaps the edge of the Great Divide between diaper need and diaper want.
Imitating Incontinence-- At times I have been quite committed to absolute 24/7 diaper use; able to do it because I was equipped and experienced and my work and daily life accommodated it (I was fortunate to have this opportunity and learned a lot by doing it.) Today I guess I live with a self-compromise in which I am diapered 24/7 but there are some limitations to how far I will imitate being completely incontinent.
Have I answered the question of the original post yet?-- wait, there's more.
Wardrobe-- Wardrobe is extremely important, including the right diapers, accessories (onesies!), and clothes that are sized to accommodate your diapers. Note that the diaper type will affect your diaper use-- after several days of consistently using heavier diapers, for example, you will gain confidence in their ability to protect you from leaks so you are able to let it go instantaneously. If you are lesser equipped then you will tend to hesitate and/or hold it until convenient.
Poop-- Everybody Poops! Just not in their diaper. Sometimes it's super nasty, and other times it's no big deal at all. Definitely if you are about to poop your diaper, standing up to do it (and staying up until you change) will lessen the mess. Once for several weeks I kept the lid down on my potty and set all of my shampoo & shaving cream bottles on top of it so that it would be inconvenient to open.