I have been using pen and paper mostly, because I like just being able to use all the space freely. But recently I ordered an iPad, so wanted to try this with the Pen. Considering that I'll also switch all my notetaking, from my computer too, which would be the best option?

Mine are mostly 8-bit games like Anomoe: The Burnable Garbage Day but in terms of productivity/art, it would be iArtbook.