Cloud and Aerith are adorable together! Their relationship is just cute all the way around.
They hit all your usual Disneyish romance plot points that It's impossible not to fall for if you grew up watching these types of movies. Plus, they have the good ole drama, and oh boy it serves.
I think I mentioned it here ( or in the Cloti thread?) that the only reason I'm not a multi shipper myself is Cloud's lacks of true agency when their relationship was flourishing, it bothers me, but I tend to never bring this up in any general discussion or hold it against them because I understand that this is a very personal reason and that the relationship between them developed out of good intentions. In short, they are really good!
As for Cloti, I just love the whole idea that comes with it.
I know I have brought this up many times here, but I just LOVE how FFVII subverts all your expectations.
To begin this story w/ your usual stoic hero, and his flowery lady, and the usual dreamland romance, only for halfway through the story to have everything shattered. Your lady dies too soon and too sudden and so there goes your perfect romance, and if that wasn't bad enough turns out your stoic hero is nothing more than your "3rd NPC from the left" whose name you wouldn't even remember in your "usual game". You're stuck with these...ordinary people with ordinary relationships to save the whole world, but that's exactly what made this game out of ordinary at that time. It was simply brilliant, IMO.
As for Tifa, she was always there, kinda in the background when it came to romance, always watching, helping, caring, so when it turned out she was the main love interest it felt like when the second lead that everyone was rooting for in a shoujo wins, actually.... that's exactly what happened, lol. It also serves as such a clean-cut between 'fake' and 'true' Cloud. This Cloud right here has agency, and a person he loves, who just happens to be the person that was at his side at all times.
And honestly? That what pains me the most when it comes to Remake. They will never be able to replicate this. This feeling of having your mind completely blown over and over again like this. But times are different now, and I think they quite aware of what they can't achieve, so they're trying new things, new ways, and I'm okay with that ( even if I don't agree with some of these "new things" that are happening...).
That said, I think Cloti is an "earned" ship. It was certainly not much popular when OG first came out for obvious reasons, but it earned its fan base over the years the more people delved into their relationship. Also, I think the older you get the more you tend to appreciate how much their relationship is rooted in companionship and silently understanding. At least, that's how it was for me.