ohhh you use manga studio EX5!?It was MS Paint. Still remember the time I draw silly drawing using mouse.
Now: Combination of Paint tool SAI, Manga Studio EX5, and Photoshop. I'm too used to Paint tool SAI inking to start using Manga Studio (despite all the delicious features D: )
for myself I use clip studio pain EX : D !
but I think both are really similar no?