Unlined A5 Clairefontaine for journals, Kokuyo B5 Campus Notebooks for study, and whatever is available for loose-leaf or temporary notes (I do have a lined A4 Rhodia pad in case I need to write something good on a single sheet, but I never do).
Perhaps if I got into letter-writing I might be more interested in exotic papers, but I’m quite content with using things that are pretty easy to find and shouldn’t be disappearing from sale anytime soon. I also don’t use anything larger than a western M, so I don’t need super amazing paper for a lot of my general notes.
My most recent ink purchase was Dominant Industry’s Earl Grey Tea, and it’s a beautiful orange shade that is well-behaved (albeit not quite as red as I was expecting when I ordered it). Absolutely no complaints - I even love the bottle, however I will probably get through it slowly because I don’t often use colours that are bright and eye-catching.
By contrast, one of the inks that is in my permanent rotation and I plan to continue purchasing over and over is Diamine Saddle Brown. It’s a more subtle, darker brown that can pass for ‘serious’ writing but still has a personality that I prefer over many other browns. If the orange of Earl Grey is a cozy Autumn fire, Saddle Brown is the tree branches holding on to their last leaves and the damp earth underfoot on a cold, foggy morning - both enticing in different ways.