What are you guys using to draw your sprites with?

Originally I used MSPaint on zoom 400% or 800%.
Then I used Photoshop for a while because it had more zoom.

But after I've got the majority of the work done, I upload it into FF3SE and test it in a rom to see how it looks. Seeing the sprites move in real time and side by side other NPCs and towns helps me gauge any corrections that may need to be done.

I can still go back to it years after I've made something and feel like something needs a minor correction so most of my stuff is scattered around my computer and it's hard for me to find it all.