You knew this was coming but BarclayPierce for the ship ask.
OMG YES YES THANK YOU FOR ASKING THIS!!
I haven't shipped anything in years as strongly as i ship them. Shipping is unusual in me, consuming or producing content that is canon x canon pairing centric is not usually my favorite fandom activity. However, they are the second pairing so far for which I ended up doing both consuming and producing stuff.
I love them so much, so let's start this:
1- What made you ship it?
I think the root for it started the first time I watched Cult. I wasn't actively shipping them at the time, but i remember i wanted them to meet so badly and that feeling was based in certain similarities i percieved.
Curse showed Nica as this really badass final girl surviving Chucky trough messing with his mind during the fight, then the movie ends with the post credit scene of Andy shooting Chucky. I remember feeling like " these two would be unstoppable together"
Cult ending up with zero interaction of Andy and Nica happening was a bit of a letdown, but in perspective it feels almost as if Chucky thought the same i did back in the end of Curse.
Better for him to keep them separated, they are too dangerous together.
As the franchise progressed, Nica kept suffering at amounts that no other character ever did except, maybe, Andy. The paralelism that can be established in season 2, with both being tormented hostages literally at the same time, kinda implies that. Andy already established as Chucky's biggest nemesis while Nica is given a plot where Tiffany becomes the greater enemy for her settles the posibility for Andy x Nica to become the anti Chiffany ship. Not in a sense of ship anti, but like a couple of final people being the ultimate rivals for a couple of slashers.
Chucky and Tiffany are an iconic couple for the genre. Wouldn't it be cool if they had a final people equivalent that is their complete opposite?
They kinda had it in Bride, but the neighbor of Tiffany and his girlfriend were a disposable parody of happy couple. The epic rivalry built for Chucky and Tiffany with Andy and Nica respectively brings posibilities for something different.
Instead of naive romantics like Jesse and Jade, Andy and Nica could be a more realistic and iconic couple of well established antagonists for them. Two persons who find each other in a fight that is not even about just survival anymore, but also revenge.
2 - What are your favorite things about the ship?
It's a sweet, hopefull pairing about two damaged people finding love. The franchise, specially on later entries, leaves little space for hope so the idea of it's two most suffering characters finding love ( either romantical or platonical, although i prefer romantical) in each other warms my heart.
i feel they can be really tender together but hella scary when it's about their enemies. They can understand each other, support each other but also oscilate between helping each other heal or mutually feeding their obsessions given their allies to friends to lovers dynamic.
One of other many things I love is how Nica is a perfect fit in Andy's family ( also keeping in mind that she lost hers). Kyle already likes her, she would get along so well with Karen. If Alice would have survived, i'm sure she would have loved Andy ( and this makes me super sad)
I have many many more things to mention here, but this reply would become a tedious essay length ramble if i continue lol
3 - Is there an unpopular opinion you have on your ship?
I don't think so, i agree with most of the headcanons i have read from other people about them and none of my own ideas so far have been drastical contraries that could be considered unpopular opinions.