What are some ways I can use Project and Global Verified lists?

I really haven’t played with cross-posting on different projects’ verified lists.
Or, used the Global Verified (or other three) lists.
I understand that the global list may have posts on niche-specific targets, like (e.g.) pinball machines, tulip bulbs, and lightbulbs and so would it be weird to try posting a new site that focuses on vegan food using the global list, or one of the other niche projects’ lists?
Are there any negatives to using my own verified lists?
Could it be perceived as spam if I post multiple links to different pages of the same domain on a single target?