Ask HN: Optimal Journaling Book Choice?

The journaling bug has bit! ^_^

I like the idea of standardising my book choice for the long run, and Moleskine is easily available in my part of the world.

I currently have 3 different journals on my desk as I type this. One is an A4 hard cover. The next one is a slightly smaller soft cover. And the last one is an A5 hard cover.

I'm exploring with all 3 because the long-term collector in me wants to settle on 1, and then stick to it for multiple journals to come.

I'm curious which journal size and cover type the passionate journalers in here have opted for and why.

Thanks ^_^