Hi Vinayak!
Thanks for stopping by! My SVG Animations come from all over the place, but I would say, I'm usually interested in the technical aspect, so I'm trying to demo or try out some way of working with them. After I follow that curiousity carrot, the design just follows as whatever will get the point across either in the most clear way, or the most playful way, or both :)
In terms of the framework question, the first question in the thread kind of addressed this. I really love working with Vue as well and I think it's great for beginners but there are a lot of reasons to choose React as well. I haven't worked with Angular at all, and that's kind of intentional- less as a "this doesn't interest me" way and more in a "there's only so many hours in the day and if you want to learn something deeply you have to make a choice somewhere" kinda way.
Hope that helps!