Aight, now here's the main course.
I had my firsthand experience with animation on this nifty little
app called Flipnote Studio, basically an all-in-one mini animation
studio.
Of course I'd use other programs down the line, such as Anime
Studio (Moho), a bit of stop motion too, the occasional 3D with
Blender, and recently Cinema 4D, and most importantly, Flash (or
Animate), my primary tool for art and animation.