Must have gameplay mods?

I tried playing without mods after playing with them for a while and I just can't do it lol. I go to do something I am used to just to remember it came from a mod.

I know about MCCC but I was wondering what others you all would consider a must-have. I have all of the packs and use things from all of them (I plan on getting the new one as well when it comes out). At times I like having a household with one of each type of sim and a pet so in some households I will have a mermaid/merman, human, vampire, alien, and then add in a cat or dog or both (This isn't every household but I usually try to have at least one of them).