HIIIII!!! my favorite question to answer...ask me about my pens next..i have a lot of journals, all of which i use because i have a genuine problem and am addicted to stationery but!! the main ones i have use are:
- midori md codex for my junk journaling which i have used and re-bought for many years!! a big favorite of mine;
- the one journal i post a lot is my paper republic xl with the different inserts for collecting words + definitions, morning pages/brain dumps, and creative writing (but i haven't been using it as much lately since it's a lot to carry around);
- lately i've been switching between the a5 maruman mnemosyne ruled journal for journaling and the b6 midori grain for on-the-go writing!!

i have a couple of others i've used though the years: apica cd notebook, kleid a5 grid, rhodia, stalogy, but the ones above are my current go-tos :]