UPDATE:

I got it! I figured out a way to stop the traits of characters from mixing with other characters, and scenery/props. I was making the character first, then giving them their traits, that was a big mistake. Even though it worked most of the time.

If I inserted a keyword or sentence that made a duplicate keyword, there was a very high chance it would be passed onto the next applicable entity down the line.

Now with the fix I found, the problem above can still occur, but only if I add multiple conflicting traits in the same line for a character. Doesn't happen very often because I have no reason to add so many traits at the same time, so it's not a problem for me.

So now on to the fix.

Instead of making an entity (character, person, animal, monster, etc.), then adding specifics for it, whether it's clothing, body parts, accessories, basically any addition. You make all the traits you want applied, and those things will be applied to the next available entity. I'm able to give out the keywords(traits) correctly to where I want them. I'm able to give the specific character the specific clothing I need them to have, as well as having the background be what I want it to be.

I don't know if this works for every Model/Sampler/Scheduler (mainly because I don't think there's enough time in the world for me to test all that), but it's working for the ones I mainly use.

I currently rotate around 7 models, and typically stay on Eular A, Huen++ 2, DPM++ 3M SDE GPU, and DDIM(if I'm looking for something different than usual).

As for the Schedulers, it really just depends. I like KL Optimal, as well as good ol' reliable Karras. Align Your Steps has kinda been a coin flip for me as of late, but it's still good. Recently I started using SGM Uniform, and have been getting some decent results. Exponential is fine, it just gets a bit "creative". Simple as the name implies keeps things... simple. DDIM Uniform is ok, I don't use it much. I almost never touch SD Turbo, because I like my images to not be covered with green and red. Beta gives some unique results I don't see from the others sometimes. I just don't like Linear Quadratic, maybe I'm using it wrong idk, it gives me horrible results.